Why does avg disappear from my computer

at least  four times avg has made me reestablish my acct information as if i did not already have an acct. avg tells me i am using the wrong padssword yet im loged into my acct.which they have again told me i do not have.i got a warnning message from mac?says i got a virus and i gotta do something about it so i go to my avg viruis protection thats suppose to be on my computer and nothing not a damn thing.who are thiese irresponcible avg people and why have i had to go threw this crap so many times.i know i didnt install the product wrong because they did it for me.four times ,at least and thats not alot of happy dust up my ass.im really just sick of this .what should i do.i am absolutly not willing to go threw the bullshit again i just want the thing that i paid for to be there when i need it why cant they  fix there damn product and leave me the hell alone i dont think thats too much to ask.ya know at first i thought hey mabey im doing something wrong perhaps im doing something that is making muy account just dissapear-NOPE! AINT ME.all i did is cl;icked an the avg ap and again the 4th 5th 6th time and it just wasnt there like it never existed.funny avg can reinstall or fix whatever it is over and over ond over but hey i dont got nothing better to do with my time i dont have i life to just do something else but go thrtew this "process" again and again and agaion,if anyone out there has an answer ide shure like to hear it.imreally pissed and i wasnt ten minutes ago