Bad service and unfair business ethics

I have a credit card handed over with absa , l have been paying the account trying to make it up to date, communication was lost from their side and they deactivated my banking up . I make numerous efforts to get my balances and today after trying so hard they tell me you can't use your credit card anymore because you have been in arrears for long , refer me to complains department which is 2 times worse everything someone drops a call in your ear. So lm the consumer and have to chase after them ?