Moove charges double fees on cancelation after assurance they wouldn't

In March this year, I contacted the manager of Moove Sunninghill and requested that my membership be canceled prematurely, due to the gym closing their swimming pool. I have email confirmation saying that I will not be charged any additional charges. Lo and behold in April I got charged double my monthly payment. I have sent several emails now but I'm being ignored. I am not a happy guy right now.