IGNORING QUERY

I have been trying to get a query resolved since April. Their Claims Statement 8 of 22 reflects 2 amounts which Momentum did not process, R2478.08 and R929.28, due to the INCORRECT TARIFF CODES? No response. I then contacted the surgeon's accounts manager and she started contacting Momentum for assistance. On 5 May I was advised by her that they STILL had not responded. UNACCEPTABLE. There is a shortfall that I have to pay the surgeon but cannot do so until this issue has been sorted out. I am very unhappy about their (sometimes) bad customer service from such an ESTEEMED company.