Room darkening shades have light coming through all around the sides

bummer. Especially since you paid to have this done. The shades need to be installed inside the window frame not out. For a quick fix, there are blackout curtain rods that wrap around the window..then pick up 2 black out curtains to put on either side.

i work nights and sleep days..I used shades that were labeled cut to size,,and used hook and loop tape thet came on a roll from a fabric shop double sided tape to hold the Velcro on the wall side and the shade side,

Could you possibly use double stick tape?

I had the same problem. Just hung some curtains over the blinds. That seems to have done the trick.

Do you have drapes or curtains hung on the windows? If you hang room darkening panels over the windows that will help immensely.

can you put a dark frame on inside of existing window frame..pushed back so shade will move?