I'm very unimpressed with Truworths!!!!!

I have an account with Truworths and have had one frustration after another. Firstly wasn't issued with a card when opened my account, since then every time I go into a store to get in told they have no cards. I order online. When I have ordered several items they arrive in drips and drabs sometimes weeks later. I have paid up my account every month, May was due on the 5th. I paid it on the 1st but mistakenly put my old account number as a reference. Today being only the 14th of May I have recieved 4 pressing small and an email from collections. Since when do you turn someone onto collections 9 days after a payment is due? What kind of aggressive nonsense is this. I have already been hit up with R77 interest and they're demanding my June payment. I have spoken to collections and customer service and sent the pop twice. They're claiming I R1807.74 when it was R901.77 and the R905.97 is only due on the 5th June. To add insult to injury there's a huge red stamp across it saying overdue. The statement is already threatening a bad credit record. The invoice was requested if you don't log into the app online you don't even know what's owing. TERRIBLE COMPANY AS SOON AS MY ACCOUNT IS PAID UP I'M CLOSING IT!!!!