Check Engine Light On problems of the 2011 Land Rover Range Rover Sport

Purchased the vehicle 07/10/2020 check engine light came on 8/17/2020 called the warranty company took it to redwood city range rover dealership 8/18 (see below invoice) paid for car rental through that time. Picked up range rover on 8/31. Check engine light came back on 9/14 (see below invoice) with gas smell took it straight to dealership got another rent a car paid for services 9/18 called carvana and spoke with alex 9/18 to let them know I only had the range rover for 2 months minus the 2 weeks the dealership had it to fix and I have been having "major" problems with the vehicle. I was told by "alex' (he would not give me the initial of his last name) apologized and said there was nothing carvana could do. He stated the dealership probably did something to the gas tubes or loosened something. I told him I wanted to speak with a manager or I am contacting the bbb and the automotive association because the problems I am having with the range rover are not "minor" these were "major" problems and faulty engine, gas, and the other repairs could have been disasterous to my children and my life had it sparked or ran hot. Alex said he would have someone contact me. He later called and sent a text a hour later asking for copies of the invoice and said the management team and maintenence is requesting it to look over. I have yet to hear anything else from carvana. During this time the vehicle have been driven on freeway, city streets, in motion, taken to the gas station. (invoices are attached).