Shoddy workshop practice from TP&D Centre

I made a foolish decision to take my BMW X3 to TP&D to have Both Control arms and Mcpherson struts top mounts changed, my X3 was out of warranty and to save money I opted for TP&D. Having worked in the Motor Ind. for 44yrs (for 4 OEM's) incl. BMW, I had many years experience of testing and manuf. vehicles. On receipt of my Vehicle the mech. when asked whether he had torqued up the Safety-Critical joints, he admitted to not doing this, but stated He Had "tightened them Hard"! On driving away under load there was a very loud "graunching" noise from the Drivetrain which b4hand was NOT evident! Based on my very concerning discussion with the Mech. (Torque spec) I decided I did not want to take my vehicle back to TP&D. and opted to take my X3 to BMW Zambezi auto. On inspection, they diagnosed that an RH Tripod frt. driveshaft bearing had fallen off (it was lying in the driveshaft Hex housing), BMW Zambezi took photo's and provided a report. On returning to TP&D arm with the report, TP&D denied everything and implied that BMW Zambezi manf. the problem! I stated that was not the case and I had no intention of fooling TP&D but, requested the R5k for the new driveshaft. TP&D blatantly refused. I took the concern to the RMI, who do nothing more than facilitate, they do NOT enter in a responsibility discussion, again TP&D took zero responsibility.