Mcdonald's India — Piece of glass in the Piri Piri Mc Spicy chicken burger

Address:

Jubilee Hills branch, Hyderabad

I would like to lodge a complaint about my last visit to McDonalds in Jubilee Hills in Hyderabad on 2nd April 2023. We had ordered a Piri Piri Mc Spicy chicken burger, on the recommendation of the billing person. While eating, my son got a piece of glass in his burger. When we called the store employees, they asked if it was in the patty or in the bun. He did not ask if my son was ok.
First of all, it is absolutely ridiculous that something like this happens. This glass piece he realised while biting therefore we could take it out and show it to the store manager. Not sure, if any other pieces of glass have already gone in and whether something must have happened internally.
We spoke to the store manager and he refunded our bill. But that is not all i seek. I want to report this matter, as McDonalds is the most preferred brand for a lot of children and adults, and therefore they should be extremely careful in the hygiene part in making the products and far more empathetic towards the customers.