Very poor service

I have send more than one email with proof of payment to Dotsure. One minute I get an sms to thank me for my payment, next sms I am told I must pay. I'm so sick of Debt buster's inability to handle my business and I will nèver refer others to them. Last month I got a statement from Wesbank telling me I am in arrears with a certain amount wich was more than my monthly instalment. And on the same day, I received a message from Dotsure saying I owe them exàctly the same amount as which Wesbank wanted from me. Coincidence? I queried both Dotsure and Wesbank's payment department via email and got no reply till today