Apex Services India — overcharged and bad service

Invoice no #6741
We found the contact of this service centre while searching online for a service centre for kent ro. Our regular service guy was not available so we called apex
There was problem in ro due to which it did not start. The guy from apex replaced all the parts including membrane, sediment, and carbon which costed at rs3800 including service charges.
The ro stopped working again after few days. So i called them to come over and repair it again. I talked and followed up frequently with a guy named sandeep. But even after calling them for 3-4 days, nobody showed up.
Thankfully our regular service guy was available. We called him and was shocked at the bill. He told us that there was no need to replace all the parts as he had installed a pre-filter on the ro to protect membrane and other parts.
He took rs300 including service charges and repaired the ro.

Apex overcharged us and replaced all the parts if when it was not required.
They are not available and work at their own convenience.

Do not call them.