Virgin Active assistance

My son has a contract with Virgin Active, which expires end of May 2022. I am the account payer. They keep on phoning him telling him he is in arrears. According to my bank details we are not in arrears as arrangements was made for a 3 month deduction that went of my bank account on 28 Febr, as well as a 2 month deduction that went of on 29 April. I phoned them and tried to explain but they keep saying my son must contact them directly. What is he going to tell them? He is not the payer of the account, I am. I am just trying to get some kind of account from them to do a recon, however, they will not give me any detail, because the contract is on my son's name. This is ridiculous. According to my records I only owe R460 for the final month, which I am prepared to pay now if I can just get to the right person !! The contract must be cancelled at the end of May, when it expires.