Worst service

I've recently posted a complaint about edgars until today I haven't received any feed back I've contacted them regarding the double installment I had to pay and they couldn't even tell me why I've explained to them that my installment is always under R300 last month I had to pay R500 then I received this sms. Valued customer, due to a technical error, you'll notice 2 issues on your Oct Edgars Account statement. Interest due in Sep was not charged & will reflect as a double billing in Oct. Interest was charged on your 6 months interest free plan, this has been corrected & will show on your Nov statement.NCRCP38. I don't have a six months plan I have a 12 months plan but still they can't explain. I would really just like to Close my account it has been pathetic service since RCS took over edgars not even the staff can explain what's happening