Disgusted by Zone fitness

My son had an account with these people and last month I started gettn calls from SSDA telling me I owe them money.. Apparently the account was handed over in July and they had my cell number.. When I asked who provided them with my details they told me zone fitness..i called zone fitness and spoke tu sue Carlin at westgate mall branch.. She could not assist as I needed to know what happened with this account since 2018.. There was no contact since that time.. It is 2021 and they decided last month tu hand this account over.... I hve also spoken to sibusiso... Sunethemba and another lady at ssda and they confirmed account handed over by Zone fitness in July and my details was given... I then sent a mail to Cornelia at zone fitness head office and she is not assisting at all.. She rather told me to supply ssda with my ID number on their request. How was this even handed over when I need tu provide an ID number.. Ssda is harassing me on a daily basis when I told them I'm not dealing with them. They need tu hand this account back to zone fitness as this is not even my account.. I'm really disgusted by them