Failed to put left shock in properly!

Took my vehicle to super quick on the bluff to put new shocks in. Took 4 hours to do BUT they didn't put the left shock in properly causing the rubber to be damaged & the shock moving around when driving. Brought it back following day & they insisted on that it was stabilizer that is faulty when in fact its not! Took it to a machanic who showed us that through their carelessness that its the left passenger shock that is the problem!