cancel service

Sign up for premiun plan with 2 lines. Told that I could use second line for internet only,to watch tv,stream sports,basically do anything and would have unlimited excess and no problems. Work great for about 2-3days, started slowing down, very slow uploading going off and on, also had to purchase att router purchased it at whalmart, told it would be cheaper. Problem 1.

phone that you pay by the month a54=14 something like that, got it at att store with service, basically same thing, work great for 2-3 days woke up 3ard day all my programing was gone and loaded its own programing completly screwing me up, got most of it back, took all day, woke up next day did same thing, 1st time samsung programing,2nd time att programing or vise versa. delete my yahoo email account miss all calls that day because it switch to sleeping program trying to force apps on me interupting service with pop ups tring to get me tpo download threre service, wouldn t do it so it did it again while i was asleep. Had enough took phone back and tryed to cancel servicewas lyed to about internet, that was the lonly thing i really wanted but to make it work had to get phone planunlimited premium plan with 2 line, also added maintance, told tim i didn't want and trade for up grade i told thbem i didn't want. its been 13 days can i get out of this without paying anything, because if i cant its going to mess up my credit, because (Edited per community guidelines) will freezse over before i give them 1 penny