Fortnite vbucks

[bags0455]

So unfortunately my son managed to spend £140 on my card for vbucks. I've always had to give permission but for some reason this time it let him.

I emailed Microsoft and they have refunded me and the money is back in my account

Has this happened to anyone before and they have been refunded

Wow that's a lot you think there might be a cut off before he can spend that much in one hit.

I've had something like this, I was also able to get a refund

I tried to set a some sort of lock up but couldn't find anything, ended up having to tell my son if he pays for anything without my consent he will grounded from xbox.

Can you let me know if you work out how to set a lock