Rent to own tv

I am a customer with Teljoy over 5years now. I rent to own a TV that was fully paid two months ago. I then sent a email asking them to adjust my account. They phoned me and admit that the TV was paid up. But two months later they still charge me for my tv. Please help.

I send an email last week 28 Aug, with no feedback and I again send and email 4 Sept with no response.