Mr Skosana

I went to Hyper parts to buy the jeep compass 2.0l service kit for my car and the sales man went in to the system to check what service kit to issue. He gave everything and I ask him to be sure about the staff he is giving he and he everything is well. However their system state 10w40 for the oil however my car use 5w30. I use the oil but now my car is indicating oil service and I went to the store to ask for another oil but the manager said I must buy a new oil but it did buy oil from the shelves the sales man gave it to me as he is competent and experienced. Now I need to drain the oil and the anti freezer to sort out their problem. Please some one assist me.