issue with ileostomy leakage

Hey ostomy friends! I am a new owner (Nov of last year) of a temporary loop ileostomy while my colon heals from rectal cancer! I know its possibly because im overweight but I CONSTANTLY have issues with my bags leaking from right besides my bellybutton where my stomach is uneven. Not to mention my stoma is more of an oval shape so I have to cut the hole kinda odd so that I wont have leaks (which I still end up having often). Does anyone have any advice on how to stop the leaks? I have barrier spray and the powder so im constantly crusting to keep my skin from being so irritated. Im running through bags and I havent even found someone that takes my insurance yet so that I can order more