Congratulations. That women and the spiteful women here have convinced a single mum with developmentally delayed twin toddlers to stay indoors at all times.
Please. OP was so offended by being told to watch her children better that rather than do that, she complained to the shop. She then came on here to tell everyone about it, and doesn't like that she's been told, yeah, the assistant sounds snappy, but actually, you not managing the situation caused it.
She titles her thread that this must mean her kids should be "locked up". Yes that's the only alternative. Let them do whatever it may be in shops/restaurants/general indoor public areas, or imprisonment 
And now in an equally childish response, "oh well clearly I can never go to the shops again" because she didn't like what she was hearing
that's right, the only way to deal with people asking her to acknowledge/address their behaviour is to flounce indoors and sulk.
It seems any huge over reaction or extreme defense is all that's available. I mean, you could try just supervising them better than you thought you had too, or say fair play, I usually do but I ballsed that up a bit today and got a stroppy woman point it out. But that's far too simple. Let's be housebound and blame that on everyone else too.