Is There Any Way To Convince My Medicare Advantage Plan

Is there any way to convince my Medicare Advantage plan to cover massage for Fibromyalgia? It is the only thing that stops the nerve pain and resulting muscle tension but my credit card is run up and my social security check to small to cover treatments. It would be cheaper than drugs, save them from paying for a heart, liver or kidney transplant down the road when all the drugs I'm on take their toll. I'm 50 & suffered every day since I was 32