Planet fitness Glenanda bad service

I had initially signed up with planet fitness Glenanda with a black tag membership in June 2017,I then decided to sign up with the discovery vitality membership for my wife and myself in 2018. I had been to the gym on the 2nd of February 2018 to take out a new membership however it’s now over a month and only my wife’s membership was processed on the 2nd of February 2018 according to what the admin manager states after endless phone calls is that my membership was processed on the 12th of February 2018 . I am not willing to pay for pro rata as I initially paid R4000 upfront and was debited on the 25th of February for one member whereas I should have been debited for both of us now I am liable to pay for two members and the pro rata of the previous month. This is unacceptable. Management never calls back as promised you being the customer needs to make every attempt to rectify their errors.