Let’s assume you know nothing about the history of the car, only that it didn’t have an MOT and it was retested?
For brakes after a major leak, then bleeding from just one caliper could still cause issues and a ‘soft pedal’ with air somewhere in the system. It sounds like the garage just wanted the job done quickly.
Bleeding brakes requires starting at wheel furthest from brake fluid reservoir, then finishing at wheel closest to reservoir. There’s also a process in VCDS to bleed the ABS pump. It would be worth getting the brakes bled properly, which means running at least a litre of DOT4 fluid through it. Normally it’s around £100.
For those that are spanner handy, then a Draper bleed tool is very handy, in the respect it keeps the reservoir permanently topped up while doing the job. Given the car is 2008, I’d invest in new brake nipples too. They are invariably damaged or worn. Run a smear of ceramic grease on the threads before fitting.