Never available- going up and down on the phone

I got my green light policy with old mutual late last year, and since then I have been trying to link my gym membership with my policy so I can get the benefits to that come with the offer. Since September, I have been calling the same number over and over with no help and also recently last week I have made a calls a few times and was transferred from pillar to post with no assistance to my enquiry. till this day I am still unlinked to my green light gym benefit, its been over six months and I keep getting the same number and story over. Please help me get proper service from your contact centre- ***was the number I was given.