Homechoice is *****ing from us

Homechoice is very good until you pay. My statement read pay 31 March 2019. I have settled the full amount on statement the 13th March 2019. April I got a statement R160, service fees and interest...I ignored it because I paid full. Then I started receiving up to 5 phone calls day from different numbers with very rude people telling me I still owe Homechoice. I try to explain that I paid full. I went to the bank to do some business then they told me Homechoice has reported me. Put of frustration I then discovered the balance is now R220... I know it's not worth trying to explain to them it's wrong. So I paid the R220. Believe my the next day I started getting calls I owe Homechoice R18.00... some service fee..... NO SERIOUS!