Terrible service

I made payment on the 15th of December, till today they still can't allocate the payment. Till today We still call them every after 3 days for services we paid for. No one bothers to call is back with feed back, mind you we jave Sent proof of payment countless times, as well as bank statement but still they tell me they can not allocate payment. I went to the bank more than 2 times and they confirm the payment went through. The service we are getting is utterly *******. No one bothers to call me back as they always promise. I have had it with them and their stinking service