hmmmm
brakes,
tbh, the brakes should have been fully inspected,
which means wheels off, no excuse
you need to check the brake shoes for wear, uneven
you need to check wheel cylinders, are moving freely, also not leaking
then you need to adjust the brakes,
yes, drum brakes can be adjusted from outside, inside face of drum, but you wouldnt waste your time unless you knew the condition of the brakes etc
you can check balance, fairly acurately, if you have a good feel for things
2 persons, one in car for brake pedal operation, other with wheel/brake
spin wheel, person push brake pedal, feel when it contacts, do front axle first, so r/f then l/f, a few times to get feel
rear, do same,
handbrake easier to test,
get person to pull handbrake up one click at a time,
go from side to side feeling the brake bite, should be equal bite from within 1 click etc
should bite at 4 clicks be fully locked at 7 clicks
exhaust,
no excuse for a exhaust after its been looked at,
easy to test, engine idling, hold a good thick rag over end of exhaust, another person check for leaks
no excuse this wasnt fixed, either by cleaning and resealing joints with joint sealer, or replacing joints or exhaust pipe
give them another go, if not fixed, go elsewhere ?