Miscommunication issues affecting me

I used to be on Liberty's own your life rewards scheme and benefited from the discounted subscription to Virgin Active. I since moved from Libert life to Discovery health and opted for their Vitality program. I was told my own your life rewards will be cancelled and I have to pay a once off joining fee of R1300 to Virgin Active to become part of the scheme. The fact that another joining fee needs to be paid is fair as I understand the switch between rewards programs but I refuse to pay the R1040 which is now being billed to me because Liberty and Virgin Active's communication was not on par. I went into the Meyersdal branch 2 months ago advising them of my situation and was told they will rectify it -this when my bill was at R520 owing. I Did not visit this gym at all during this period as I was advised I will only be liable for the new activation fee. Thabang at Virgin Active was amazing and he phoned Leratho at Libery to try sort it out but to no avail. I am also now missing out on Virgin Active's cash back promotion as I have a black mark next to my name. I expect a compromise to be met so I can continue working out.