Empty promises,Poor service and no refund received

I called Momentum to get an authorisation number to go to a specialist (gynae)on the 11/04/2019. I was told that I will get reimbur*****t as I told them that the practise accepted cash only and will not claim from them. The consultant that I spoke to told me that I must send my Bank statement showing that the money was paid from my account,Account stament from the specialist as well as my copy of ID via email. I sent through the documents on the 23rd of April as I was waiting for the statement from the gynae,but 7 days went by without getting any feedback so I decided to call and I was told that the matter was still at their finance department and it is still within 7-14days so I have to wait. I called again almost a month after I had submitted the documents to check on the progress of my claim and I was told by another consultant that a receipt is also needed. What irritates me the most was that they don't even bother to call and say we cannot process because something is short although I was not told about a receipt initially. Now I have to go back to the doctor and ask for a receipt. I never thought that I could receive such bad service from them,they just don't care.I am still waiting for them to refund me even now,can someone please do their job!!!!!