Bad service with rude comsultants and amounts which don't match

My dad visited a doctor in 2023, on the 23.06.2023 received a statement saying I owe hamadi lab R358.60. I requested to contact my medical aid and find out what's happening. 06.11.2024 I receive a threatening sms about being blacklisted. 07.11.2024 consultant Phindile confirmed that my account is indeed handed over to transunion. The consultant was very rude with no professionalism. On my medical aid statement there is only 2items which my medical aid did not cover one was for R43.00 R85.80 Everything that hamadi lab performed was covered by the medical aid. Can hamadi lab rectify this cause I won't pay for something I don't owe. The above amount is the amount I'm willing to pay as it states on my medical aid statement.