Limp mode

[Dolly73]

Hello

i had a water pump replaced and mechanic said that would fix the no heating but it didn’t? Within 20 mins of driving my car after picked up from garage it lost all power and EPC light came on, up until then I only had a problem with no heat but now I can’t drive my car? Do you think it’s because mechanic has installed water pump incorrectly and not plugged car back how it was before he ripped it apart ( as he would have had to remove injectors and sensors) any advice be helpful right now Also why is heating blowing out cold not hot after cooliant leak fixed? 

[Steve Q]

I'd definitely be getting it back to the garage. They may have not refitted the timing belt right meaning the timing could be out.