Hoya Lens India — confusion about offer in progressive lenses in july month.

Address:

RACHANA OPTICS ,AMBIKA PLAZA, 90ft road , Gavanpada , MULUND (East) , MUMBAI, Mumbai City, Maharashtra, 400081

Dear sir/ma'am,
My name is samit m. Parab, id card no 67407583. I've made specs in progressive lenses (Amplitude plus) from one 'rachana optics - mulund. I received it on 24/07/2019.
At the time of purchasing, dealer didn't tell me about any offer by hoya lens india in month of july. But when i went to another dealers like ' royal or mayekar opticians nearby, they told me that they are giving 20% discount on hoya progressive lenses. It is given by hoya company for purchase in month of july only.
Is there any such offer? & if there's such 20% discount offer, why this particular dealer didn't give me.
Plz clarify. You can e-mail to me on [protected]@gmail.com or [protected].
Awaiting your reply..