No service, messed up my credit record

Firstly they cancelled my debit order with no prior warning or discussion whatsoever. Went in to a branch twice to rectify this with no avail. Tried calling the call center numerous times with no answer currently I have been holding for 30Mins already with this attempt at a call to cancel. My credit score in shambles because of an internet service I cannot even use because of no/poor network coverage.