Casio — unethical behaviour of casio store managers

Address:

Gurgaon, Haryana, 122001

I bought casio watch online, so i went to casio store at lifestyle gurgaon, haryana for size alter. They denied to alter size of my watch saying it is against norms, if it is against the norms then who is responsible for providing facilities/services of casio products if it is not casio store managers. Please take into account this behaviour as i dont believe casio has such irrelevant norms for its customers.