FIAT review: service - glendale

I took my car to Glendale for its first oil change and found out soon after because of a scraping sound while driving that the belly pan was never replaced, the oil was over filled and a plastic guard was left unattached. I contacted them and three weeks later I can not get any response to the replacement of the parts. No contact after calling three time and leaving messages I have gotten nothing but excuses and not response.