I regret the day I opened my account with identity.Harrassment!!!

I have an account with identity for over a year now,if not 2 years.i have been loyal with my payments without failing. HOWEVER on the last month my payment was R50 short as I thumb sucked and paid them without checking my statements. My initial payment was around R450 and I made a R400 payment.Biggest mistake of my life, I must say,they have been calling me telling me that I am in arrears and I need to pay my account to keep my credit facility open, am talking about R50 Short and already I am being threatened. They call Me more than 5 times on a daily basis and that accompanied by couple of sms's. And now in their messages am told that Am in arrears with R460...I guess my R50 shortfall has now accumulated over 30 days and is now R460. They have this useless whatsapp line that they will always ask you to send your documents to proof what you saying but that line is just as useless as their system. To avoid this issue with Them I decided to make a payment of R600 on the 25th of Oct just to get them of my back...Guess what I received and sms from them saying my account is in arrears I must make a payment immediately..I am so annoyed because at this point I really feel that this people are harassing me,and I think mY R50 shortfall could never match their level of harassment. I regret the day I open an account with them because clearly they don't even understand the meaning of customer service. All payments are done ,proof is sent to them but that doesn't stop them from calling me and sending sms's I don't even know what more do this people want from me.