Reading program paid over 24 months.

I have been paying R485 for a reading program for over 2 going for the 3rd I have never once received an invoice every time I call or send what's up messages I don't get help I have been send from pillar to post. Today I spoke to an Arrogant man named WILLY when I called him he said that I have paid in full, yet money are still being deducted from my account I called him again for the invoice he told me I will get the invoice when he gets to it mind u he had the invoice in front of him the first time. Payments made over 24 month is over R11k and I'm being told to wait for the invoice till today nobody at COMPUIQ could give me a straight answer as to how much the reading program cost.