LG airconditoner cheating

Location/place: Mumbai

Name of company/service: Dr Krinita Motwani’s dental clinic

Hi,

I purchased 4 LG 1 Ton air conditioners around two years ago from a company called Top Cool. One of the air conditioners was not cooling hence i called the LG company to come and check with whom we have a service contract. They informed me that all my AC’s are 0.75 ton. I was shocked and realized that i am cheated since i have an Invoice for 1 ton AC’s. Please help. Thanks.