Toyota — not got proper service to my car

Yesterday when i got my innova car serviced at budha toyota, i had following grievances which i gave in writing also.
The engine oil refilled in my engine was thru hose reel pipe connection not having any brand or authenticity so i couldn't, t come to know which engine oil was poured in my vehicle. I have lodged complaint in writing. Pl look into this. If my engine develops any problem who will take this responsibility. This is a question on toyota to be trusted upon. There are other grievances but word limitation is restricting me in writing. Hope you will reply suitably and take corrective action against redressal of my complaint.