Claim incorrectly processed and no response to complaint

Discovery Claims department, this is the second time in the same month that I am currently experiencing an issue with you... I am going to complain each and everyday until my query is resolved... I am not going to do what I did last time and resolve my own problem query by resubmitting because you fail to do your job properly... again I have submitted a claim refund request a detailed invoice and receipt, However the claim has been rejected for the procedure code which is on the claim... I submitted a complaint yesterday afternoon; 24hours later and I have not yet received a response or acknowledgement of my query... this is unacceptable...