FREE SKYDIGI

i dont know how i did it but i cancelled my sky subsription nearly a year an a half ago.all the channels where swithced of,i then unplugged the sky receiver from the phoneline so i could use it as a second phone.3months later to my surprise i was channel hopping an all the screen said was to subscribe call 0990 etc.the next day all the channels where back everything movies sports the lot.has anyone else come across this :D