Rude staff who lack customer service

My Gran lives in Durban, due to covid we can not travel as much. My Dad walked into Telkom Norwood to pay her account as he only has her land line number and not a statement, as we reside in JHB. The person at the door did not want to assist stating that accounts are paid at another store in the mall and not at a Telkom store. He refused to listen to the issues that we do not have the account number nor the value that needs to be paid. After my Dad explained that we have paid the account at this specific branch previously the second staff member finally allowed my Dad to enter the store. Although he was not very happy about it implying that we are lying about paying the account there previously. Upon enquiring the balance as well as if the account is in arrears, the staff member Simphiwe did not respond. My Dad informing him that his behavior will be reported and requested a pen to record his name, Simphiwe gives my Dad a pen who begins to record his name, your staff member Simphiwe then pulls the pen from my Dad’s hand, stating “This is how you write my name”. Why do I need to tolerate your staff’s horrid behavior? Clearly you do not care about customer service! #EpicFail