No technical assistance for more than a year.

For more than year i can not log into internet banking or the app. I phone on a regular basis to get the matter resolved but with no success. This morning i was on the phone for more than 15 minutes being transfered from on department to the next. I requested that they call me back and the lady agreed to phone me back. Still waiting, no call received. Should i stop making payments? Maybe that will get them to resolve the issue.