Incorrectly Billed on a Terminated Account

Theres 4 of us in our family that joined Virgin Active Glen Marais on the 01 March 2019. Our 12 month contract was expiring on the 29/02/2020. On the 02/02/2020 we had given notice. They said that the other 3 members membership will end on the 29/02/2020 but my membership will end on the 02/03/2020 because of the date that i joined which didnt make sense as we all signed on the same day and they said that i will be debited R11 for those 2 days.

I cancelled my Vitality membership as at the 29/02/2020. Virgin Active debited my account for R566.93, they said that my vitality has expired therefore it goes back to full rates. So i asked them how was this calculated and the told me the monthly rate divided by 31days times 29Days to give me what i owe. I informed them that it should be charged 2days and not 29days and they agree and have escalated this matter, this was on the 05/03/2020. Now 10/03/2020 with no response from Virgin Active regarding the incorrect billing.