Amazon India — aptechdeals company marked as item no. ap-5119 nylon 150w with 5 glue sticks glue gun.

Respected sir/madam,
I 've ordered an industrial glue gan on 30th aug. 2020 of aptechdeals company marked as item no. Ap-5119 nylon 150w with 5 glue sticks by cod. But unfortunately what you send to me a 100w glue gun which has no cash memo and no operation manual.
Moreover there is no engraved mark of company's name model no. On it and weight of the instrument also too less than what was mentioned in instrumental detail. So i do not understand whether the instrument is original or not. So i request you please send me an original and most authentic item with the same specification which is mentioned in delivery receipt if possible and oblige.
Thanking you,
With regards
Amalendu dutta
14/17 ashoke avenue
713204