Struggle to be refunded

I am so disappointed at Wesbank, i have decided to settle the debt i have with them. I asked for a settlement quotation,they told me to go their website and login and i will find the quote,and that they will send me on my email,i did but the quotation i received through email was different to the one i found on my profile. I did pay the one from the email following the website intsructions as well. And after two hours they send me another quotation different to the two i had. Later when i called them asking if they received the payment,they confirmed that they did receive and it reflects and that i paid more than i should have. I was requested to send them proof of payment and i did that on the same day. They responded and said they received it and i will be refunded within 24-48 hours. It has been two weeks now, i am calling them now and then, emailing asking for the refund or be told if i should submit something, but i am now tired of emailing and calling them, that is costly. I regret ever being their customer. I just want to get my refund and part ways with them for good.