MOMENTUM HEALTH 4 MONTHS No refund

I went for an EYE test in April. The money was paid to the supplier even though I asked them to refund me. Then we had to wait for the refund to be reversed. I asked that the refund must be made into the same account as the premiums. Now I find out that they refunded the money into a bank account that has been closed for 3 years. I asked if I will have to wait another 3 months. I was informed that I now have to go to ABSA and get a letter stating that the account was closed. I was not contacted by Momentum Health once regarding this matter. Not to say when the refund will be done or that I need to change the bank details for the refund. I do not understand why I need to wait 4 months and then its my problem if they mess up the refund. I am seriously unhappy. I need them to take responsibility and refund me the money. Why else would I pay the premiums if I could just as well pay the supplier and not the premium. The call centre keeps on asking me when I changed my bank details and I keep telling them that I send an email and was never informed that I needed to phone in to change it.