Plus 1 ^^^^
Hi
the EPB shoes sit inside the rear disc, have enclosed a picture where u can see the space where the shoes would go
so pads only come on via the brake pedal , EPB shoes only come on via the handbrake switch
plse first check main fuse box in the engine bay / FL8 fuse 30A (pink Fuse)
there is a way to turn the EPB module off without diagnostics but doesn’t release the shoes if there stuck on via the cables
quick check if u haven’t already is looking on the back of the brake disc guards to see if the handbrake cables are very tight or loose
quick note of caution when u try the emergency cable again plse be careful as sometime it can snap
But , at the end of the day and not wishing to sound rude but if ur not mechanically minded and going to get the garage to do the work it might be best for them to simply recover it on a flat bed , just get them to put Dollie’s under the wheels for ease of pulling it onto the lorry
alas if a whole new EPB and cables are required u won’t get much change out of £1000 +
hope that also helps