Sold a new Bosch fuel pump that caused 4500.00 dam

I purchased a bosch fuel pump (correct part) for my Opel and now 4days later and 4500.00 cost to me from sending my car to GM for fuel line issue find out that the part (new part) was defective causing low fuel pressure and costing me as sole breadwinner of family of four the agrevation because Bosch and Midas don't cover electrical parts under warrenty! Bosch never ever again: Pirate autospares Joburg because Midas are a bunch of ******!!!!