[AB] Shaw bb250 - awful speeds

hey just thought id ask since i really dont know what to do nor do i want to switch to telus based on what ive heard from them. so heres what things are looking like atm: (note im a newbie so it may take me a little bit to understand) we moved to glen eagles (just outside calgary about 10 minutes on crowchild) have been on broadband 250 for about 3 months now and i can honestly say as far as wifi is concerned i cant even get 20mbps even when im right beside the router. it is a 3 storey house and the router is on the main(or second floor) and is the generic cisco one provided by shaw. when i plug an ethernet cable from the router to my mac at most im getting about 170mbps real problem is on the third floor it is currently 7:55 pm and this is what im getting [att=1] any help would be great.