Fed up with virgin active membership ***

I have been trying to cancel my membership from last month already as my contract end on the 30th Sept but I couldn't get through to the number on the back of my card, the email is invalid *** is not working, keep on sayi the network is congested, I went to virgin active Ecopark yesterday and they managed to call for me and I was told that am being transferred to cancelation department but still the line was off. I want my membership canceled as of 30 Sept 2020 am not going for the month to month contract because I have been trying to get hold of virgin active since the beginning of sept