Won't stop calling me

I signed up for Virgin Active one month ago. About a week into my membership, I started receiving calls and have continued to receive multiple calls every day. The first few were a person trying to sell me personal training sessions and since then it's been automated voice calls. Every. Single. Day. I've started blocking the numbers, but I continue to get phone calls from different Virgin Active numbers every day. I know it's not due to any problems because my debit order went off and all was fine. This is obviously Virgin STILL trying to sell me stuff I don't need. I'm happy with the gym in general but can they just leave me alone? Do I need to block every Virgin Active phone number just to get some peace from them? Beyond annoying.