Internet upload speeds below below 2.5 mbps when I should have at least 5.

Cant even talk to anyone and speeds are unusable. Every 2 months my internet slows down massivily unless I call you guys then magically its fixed after sheduling a tech. Now I cant get ahold of anyone and have to reset my modem constantly. I need to maintain at least 4mbps and you guys just cant seem to get it done...