Refusal to assist with legal assistance

I am not happy at all with this service from FNB which I have been paying for for almost 6 years. Now that I have a problem which I need assistance with, they are giving me the run-around with stories to try and back up the fact that they just don't want to help me. I am battling to have my account rectified by Vodacom who just don't care about the man on the street, and now law-on-call refuse to assist me with this Goliath. I have sent them emails but still nothing. The last "legal representative" that I spoke to made it clear that they will not assist me, even though I have been unfairly treated by a service provider who has decided to list me as a non-paying client on the credit bureau after reversing a legitimate credit on my account. Despite this having been unfair, I made a payment as indicated but a month down the line my account has still not been updated with my payment which leaves me in arrears. And in the meantime I am unable to cancel this ****py contract because they insist that I am in arrears, even though I have sent proof of payment, etc. I am really disappointed in this service, since it seems they are not eager to assist the average Joe even though this is why I signed up with them in the first place.