Renault The Glen...Appaulling service

I have bought a brand new Sandero Stepway 2018 model , last year in Feb. On Monday 7 Oct 2019 my vehicle was towed to Renault The Glen because it would not start. Vehicle is still under warranty. Today is day 4 and no progress has been made on getting the warranty claim processed and approved. I was told that they will organise me a loan vehicle only 5 days after warranty claim has been made and parts ordered from France. Those parts have a 21 day lead time. Now with them delaying the warranty process I am left stranded with no transport to get to work or transport my kids to school. Have been sending email to dealership manager but he does not respond or take calls. This is really sad because I really love that car but Renaults after sales service is appaulling!!! At this stage I would not advise anyone to purchase a Renault vehicle. The car is still within warranty but we are subjected to this kind of service!!!