Advice on front &Rear caliphers

[DekF]

Yeah, I agree with Paul above. It's your bike, your life, your responsibility. There's no point passing the blame onto others or bleating about what's happened,  accept it as a warning & in future take a more pro active role in the bike's maintenance. You don't need an engineering degree to check the tightness of nuts, bolts & fasteners.
The front caliper holding bolts should be torqued to 29ft/lbs & coated with blue loctite. The rear caliper bolts to 20ft/lb &16ft/lb & again coated with blue loctite.
Tightening them to "hard" isn't recognised as an acceptable measurement.