Products warranty from date of possession of flat or date of purchase made by builder?

I took the possession of the flat in oct 2018. With in few months, few electric switch got burned and few sanitary items got break / faulty. i approached the maintenance team as all the electric items and sanitary items should be covered under warranty. Maintenance team directed me to Project team and project team confirmed that all items are under warranty. i approached the respective company and made the complaint. Electrical switches - Engineer visited and informed us that the warranty was for 2 years from date of purchase and not from date of possession of the flat. Purchase was made in year 2016 and it is out of warranty now. Sanitary items : few items replaced but few items denied as as per company engineer those product does not belongs to their company but builder is still saying that it is from same company. can you advise whether warranty of the product should be from date of purchase or date of possession? based on the same question, even Aircon companies are also not providing the free service of the first year.