bad service

good day customer purchased an engine for a mercedes w204 in november last year it was a 271 engine .engine was then sent to our workshop for remove and refit on inspection the hanging parts were all loose spoke to salesman eugine he said we must go ahead and fit engine so we fitted the engine and on start up it was very noisy so we replaced 2 x timing gears and a tensioner at our cost. spoke to eugine again and he said he will send us another engine so we removed engine and refit the second 1 he supp**** which we picked up personally .on start up engine was also noisy.customer took car away and it was festive season so he was asked to bring the car back in january car has been there 3 times now and every time it went to spares boys it was there for around 2 weeks.customer picked up car yesterday 10/02/2025 and called us last night to say it now sounds like the engine has a bearing knock.spoke to johan 2twice and there after when we call to speak to him they never transfer the call to him.i even called and asked if they can drop of car when its ready cause the customer is a pensioner and went for an eye opp but the sales man said there is no driver available.i look foward for a call from managment to resolve this issue tanx.