BAD SERVICE BY HOMECHOICE!!!

I placed an order with homechoice on march 2020 due to unforseen circumstances at work i had to cancel my order, the order was not yet delivered nd i was told it was still at the factory so i cancelled and i was given a reference number for that, i also send an email to cancelations and an agent from home choice called me back i explained everything to her she confirmed that everything is fine my order was cancelled, now on the 30th of june the debit order went of in my account nd i received an sms saying i have an outstanding balance of R1575. 00 wich i dont know why and how can they debit my account when I have canceled the order, Can home choice really fix this as it will also put a bad credit under my name!!!!!!!