Mtn can't help me with their own account 😔

Their service is very bad they can't use their own systems to help u wit a problem they created ,I've paid them but they ddnt give me my paid up letter, I've been calling them but they can help me ,they have now sent my account to nimble but it's blocked 🚫 so how can I pay an account that they can't even access that's bull****, I have important things to do n nimble is standing on my way because of ****en mtn I'm very ****ed off right now I can't get any help from mtn they ****en useless nxa.😡😡😡😡😡😡😡