About 3 weeks ago I had pads changed all around. Since then my front brakes have been completely seizing after about 20-30 min of local stop and go driving. I was told, seemingly mistakenly at first, that the prob would "go away" in a week or two but it's gotten worse if anything. Revving at about 3,000 RPM manages barely 20 mph. If i try to drive through it (on a highway) it releases in about 5-10 minutes of excruciating revving while undoubtedly eating my rotors. Once it releases it seems to be fine for until much later on the same day. The cycle repeats itself the next time I drive. Is it definetly the calipers? Is it possible they didn't put the front ones back on correctly after changing the brakes (the garage owner who is usually very honest refutes this). Should I just replace the front calipers or does something just need to be lubed up?