Paying for limited services

I have been unable to use my data (internet) for the past month, yet I am loyal paying customer to MTN. I have moreover consulted on numerous occassions regarding this issue with MTN Customer Care as well as their technical team, and still the issue remains unresolved. As a customer, I have done all I can to get this matter resolved. The only course of action left is obviosuly to cancel the contract, but I'm expected to pay for early termination fees??? This is unfair. I'm already paying for services which I'm not receiving in full. Furhtermore, the retentions officer was so arrogant in the way she was dealing with me. She put no regard in trying to understand my reasons for wanting to cancel the contract, nor did she try to RETAIN me as a customer by assisting in resolving the issues I've been expereincing. I honsetly expected better from MTN.