Is thus bulkying/social isolation or just horrible?

[Anjay1]

My daughter has been friends with 3 other children before they started year 7 in September.

When It was my daughters birthday in August, I invited all three children to Ninja Warriors and the parents to join them for dinner at TGI'S, which I paid for.

One of the kids parents put on the WhatsApp group that the kids are invited to her child birthday on the 25th October.
Two weeks before, she then put on the WhatsApp group that her daughter has decided to go ice skating with her cousins instead.
I sent the mum a private message saying that I have presents that are quite big and heavy for my daughter to carry and therefore
could we sort something out nearer the time to get the presents from me. Everything was all good.
On Monday just gone, I travelled 40 minutes to give the mum the presents. Two days later, I messaged the kum to wish her daughter a happy birthday and she responded and said thank you for the presents.
The day after, the 26th October, one of the girls put on her WhatsApp status of the 3 girls (including the birthday girl) a video of them celebrating the girls birthday. My daughter saw it on the girls status and was really annoyed and sad. I told her not to worry and things happen. 20 minutes later, the video was removed.
Yesterday the mum, who's child's birthday it was, blocked me on WhatsApp and Facebook with nothing mentioned.

Do you think I am right in being annoyed by the whole thing?
I even spent approximately £70 and this is what she does.
I've just checked my daughters phone and her daughter hasn't blocked mine which I sm relieved about but I really don't get it?!

 

[Sodie]

This is just awful, I'm so sorry

[NeverNotDreaming]

It’s just nasty and so hurtful for your daughter.

[Anjay1]

I just don't understand why the mum has done this.

I never singled her child out. I included her child to my daughters birthday in August and paid for the mum and tge other mums to eat at tgi fridays. She even thanked me for the gifts on the friday.
Why lie saying its cancelled then not include my daughter.
The child hasn't blocked my daughter though so it's all weird.

Any advice?

[CrotchetyQuaver]

Keep your dignity and don't say anything about it to the other mum, she's embarrassed you've found out about her sneakiness. What a bitch. I'd be using this as an example of how people aren't always as they seem to your daughter and encourage her to increase her friendship group as those other girls knew about the lies and went along with it. Don't let it descend into a row. Just write them all off as not very nice people and move on

[Mwnci123]

They all sound horrible. Cut your losses and don't engage further. Focus on people in your life who aren't mean and encourage your daughter's other friendships.

[Anjay1]

Its a shame because the other two girls and my daughter get on really well.

[Uniquuue]

You spent £70 on presents for her daughter?

[SparkyBlue]

Why the hell did you spend so much on presents that's crazy? However the mother is obviously dying of mortification after being caught out but at least now you have the measure of her so you know what a nasty person she is and you can avoid her. I agree with a pp who said to encourage other friendships. I totally empathise OP this type of behaviour is really hurtful

[Anjay1]

It does hurt and I'm glad that I've seen her true colours so early