Overcharged gym fees - myself and my son - no correction

Two unresolved issues remain since my debit order went off on 1 Feb 2019 despite contacting Virgin Active soon thereafter: - I have been overcharged for my membership: upon cancelling my gym membership last year I was contacted by the Head Office call centre and they enticed me to remain as a member based on me paying a discounted fee until the end of February (this would be based on the rate payable by a Discovery Vitality member with HIGH usage i.e. 75% discount despite the fact that I had, and still have, LOW usage which means 50% discount should apply). I only received 50% discount for Feb 2019 instead of the 75% discount promised to me. - I signed my son up for Club-V and was told by the sales/reception staff member that I would not pay membership fees for him for the first 6 months until the end of June 2019 but I was charged for his Club-V membership in Feb 2019... I would not have signed him up otherwise as I first wanted to see if he liked it before signing a contract.

I sent an enquiry relating to the above two issues to Virgin Active - the first response just explained what I was billed for and the second response (after my further follow up) just outlined the Discovery Vitality rules and applicable discount. I know the rules - what I do not appreciate is being **** to or admin not being properly done. The Humewood gym Club Manager, Desiree Mooodley, was copied in on the second reply to me from the 'webadmin' team but I have not been contacted by her nor had any other satisfactory response or resolution to the above two issues.

It seems Virgin Active is happy to take my money but very quiet and slow when it comes to resolving the above issues - whether at a Head Office or Club level. Poor customer service!