GEMS change option on my behalf and failed to fix and pay my money back.

On the 14th April 2026, it came to my attention that GEMS has deducted an amount of R8,289.00 from my salary as membership monthly contribution instead of R2,354.75. This came as shock to me. I then called Gems on the 15 April 2026 and spoke to a lady whose name I forgot, trying to establish why such amount was taken from me and the lady told me I have changed the Option from Tanzanite One to Ruby. I told the lady that I did not such thing and she kept on gaslighting me insisting that I changed the option on my phone by dialing * and some gems code which I never heard of. I kept telling the lady that I do not have the interest to change the option, there is no way I would change it. The lady made it clear that no one else can change the option but the main member which is me. After gaslighting me she put me through to membership department where I spoke to the other lady who told me the same thing and said if I insist that I did not change the option then she will escalate the mater for investigation and that I must call after 48 hours for feedback. On the 21 April 2026, called Gems again and spoke to Themba whom after picking up the problem on system told me that indeed an option change was done but not by me. Themba proceeded to say that another member whose membership number is almosost similar to mine has requested an option change, but by mistake an option change was done on my membership number and also that an option change for the member who requested has not be done. Themba then told me that he will send an email to someone who is responsible for this case with all the information he has told me and also ask that an option change for me back to Tanzanite One be made and that a refund must be made since well I did not request an option change. The reference number for the call with Themba is: MH***. I then called again on the 28th April 2026 and spoke with Lehlohonolo who told me to call on the last day of April and he gave me a reference number: MH***. I then made a follow-up call on the 30th April 2026 and there were still no developments on this matter. I received no feedback from Gems. Gems is acting like I am the one who changed the option when it is the error on their side and I am the one suffering not GEMS. I have to many responsibilities. This is taking a toll on me financially because I'm a put to debts I didn't foresee. Debit orders are bouncing. Please help.