Xtratime airtime loan ****

I have been getting this xtratime notifications now for the past few weeks and everytime it comes through(which is early hours of the morning) the light on the screen stay on draining the battery! I did not subscribe to this ****! I have asked how to remove this **** only by getting responses of using codes that does not help or remove it! Everytime its a new code and the next morming ut pops up again as usual! Im tired of the **** and wants this xtratime removed from my number on your side asap! Reference Number: ***. Please dont send me more codes to try as they do not work and not gonna load airtime on as that gets takin away little bit everyday even tho I dont make calls , and again not subscribed to any service! Please sort this **** out on your side!!