Tiresome Subscriptions

Its really becoming anoying. Time after time I get a sms for some or other subscription fee that I didnt apply for. When I go to Cradlestones mtn. they stop it, but I never get my money back amd a few weeks later it happens again. Its really getting tiresome. Im 83 years old and never go on websites or anything accept my normal apps. Please assist me because this is getting so bad. My no is ***