Disappointing services after over 3 years

I have been doing purchases for years with Takealot, in fact my last delivery was during last week, using same bank account via pay fast. Yesterday I tried making another purchase to no avail?????? I have mailed customer support and just no help! In fact I asked if I could do a manual EFT , but no they instead they mailing me to check if there is money in the account; check if card expired? What a nerve, I am not a child!!!!!!!! Had the nerve to mail and different persons with the same messages, felt very humiliated and insulted. How dare I ask if you have money, when when paying online, you choose the account with funds, surely, it wont accept if no funds, I am disgusted. Would appreciate urgent as still would like to pay for my order and please with customer support! Appalling! Dont ask me for screen shots; go and ask your technical team. Had the same problem in December!