Milady’s Service Shocking!!

I have a Miladys account and I pay it religiously every month. After paying last month I got a statement at the end of August 2024 and it showed my available credit of R3783. When I wanted to buy something on the 3rd September then all of a sudden it shows that I owe them -R3911-22??? I chatted to them online via the Mr Price app and I phoned customer care too they told me to go into the store. I went in to Mr Price the said they can’t help me I must go to Milady’s and ask them to update my cellphone and the will reallocate the correct balance to my account. I went to Miladys and the say the can’t help me. They updated my cellphone number and said I must call customer care which I did again and then they told me my account is blocked?? Why is it blocked? Then they said I must go back to the store with my ID. This is very very frustrating I just want my account sorted and it’s not getting done!!