Extremely slow service, no feedback

I am currently on the Ingwe option from Momentum, which requires me to send annually proof of income for them to verify that I can afford the option that I am on. If not sent through they automaticaly just assume that I am earning more and move me up to another option which I have to pay double the originally agreed amount. In the beginning of January I contacted momentum to inquire what documentation is needed from me to send through as they deducted the money off of my account, They said that I need to send through a 3 month bank statement + a letter from my previous work stating that I no longer work there. I then everytime have to wait 3-4days for them to \process"the paperwork. I then had to phone them again where they now said I have to sign a decleration of income"