Very poor customer service and misleading clients.

I went for an eye test on the 17 January 2019 at Dihlabeng Branch in Bethlehem, I got an invoice for R8658.20 of which the agreement was I will pay R5764.40 over 6 months debit order and they will try and claim R2899.80 from my medical aid,I had informed the lady that was assisting me that my medical aid does not have a separate savings for optometrists everything is taken from my day-to-day savings and she said she understands and will only claim the amount that we agreed upon,they contacted my medical aid and were informed that there is no separate savings and the funds will be from my day-to-day and they cannot claim R2899.80,the medical aid will pay R5300 which is available from my savings,they never contacted me to inform me of the changes,they went ahead and claimed my entire day-to-day savings without my consent,I only discovered this when I checked on my medical aid app on Tuesday and to my shock I no longer had savings on my medical aid.I contacted the branch and asked what was going on and could not get a clear answer and was informed that the lady who assisted me is not at work.I asked for the order to be cancelled as I was mislead and I am no longer interested in their service.I was informed that they will contact their head office and cancel the order and will get back to me,I contacted the head office yesterday and was told they will investigate and get back to me.Today I called the branch as they never got back to me yesterday I was informed to give them a chance as they are still trying to resolve the matter ,I later received a call from head office and was informed that the order has gone through and there is nothing they can do to cancel the order. I called my medical aid and was informed that I have to call to branch as it was their responsibility to cancel the order and reverse the claim as I have not even received the glasses.I called the branch and spoke to the branch manager,she was very rude and didn't even want to listen to me,she was shouting and told me that the order has gone through and there is nothing she can do and she dropped the phone.Im very angry and frustrated by the fact that I was mislead and its January and I no longer have funds on my medical aid,I get sick often and have to go to the doctor so now I don't know what I am going to do because I no longer have funds.All I ask is for this order to be cancelled and my funds get reversed back to medical aid,they can claim R518 for the eye test as it was done but can the rest of the funds be reversed as per the conversation we had yesterday.This is ***** and very poor customer service.