Tired of being rebuffed

I have been corresponding with their call centre for 2 months now to try and sort out how they are allocating my claims to my PMB/MSA/Self Payment Gap/Above Threshold benefits. I have even resorted to contacting the Medical Schemes Ombudsman and all I got from them was a list of their allocations. The more I asked them to audit the way they have allocated my claims the more I get told to tell them which claims I am querying. I told them there are so many that they must do their job and check their own work. I have received half replies and are then told that the case is closed. They have done nothing. The more I ask them to escalate my query to a manager the more I get ignored. I am now tired of them trying to rebuff me instead of getting someone who has more knowledge and authority than a call centre to contact me.