Charging me for the wrong membership

Hi I joined virgin active at the End of February. We wanted vitality membership but because the vitality system hadn't synched with the virgin system the salesman joined us up as normal members and then when the system synched they would convert...no cost to me.....in march I got 2 bank charges 630 and 740. I went in 3 x every week that month...I paid my vitality joiners fee in cash.....they said there was an issue with the date of birth on vitality. Chased discovery and vitality no issue....in April I had another 2transactions of the same qty out of my account. I told them In the first place I wanted to pay cash upfront annual membership....but they insisted they still needed a debit card.....they say they are trying to sort it....I'm sure they are but see no evidence of any action or refund being made....I joined the gym for enjoyment and leisure..not for extra stress. It's now 2 months later and feel I have no option to complain now....or close down our membership as this can't go on next month...can you please look into it....I mean no bad feeling but need to see action. From the start this is a virgin system issue but I am paying for it.. Jenny and lynn.( Joint members)