EXCEPTIONALLY POOR CUSTOMER SERVICE

I am extremely disappointed with RSAWeb, They made me pay for the same month twice, despite me having irrevocable proof that I did not owe them a cent. I spent all of 6 hours of my life trying to hammer some logic into their accounts department, but no success. I was promised many things which never occurred either. Now, subsequent to making the second payment for the very same month, they just sent me the 3rd bill for the same month, threatening to disconnect my services AGAIN for the second time (same month, after they switched it on after making the second payment)... Nothing would make me happier than jumping ship, but they have some clauses in their contracts forcing you to pay out thousands if you move to another provider. Vodacom was in my area not too long ago, offering me the same speed I have now, on the same carrier network for R899pm whereas RSAWeb is R1085pm.... Their service is TERRIBLE, getting hold of help is IMPOSSIBLE, getting through to them, as in they understand your point is IMPOSSIBLE, even with written proof, BLACK ON WHITE that they now owe me money, they still recon I owe them. VERY VERY VERY POOR CUSTOMER SERVICE