LG Electronics — Cash back promotion

Address:

13 herbert place stoke plymiuth pl2 1ru

I would like to make a complaint about the service i have been advise that the fridge freezer (GSXV91MCAE - SERIAL NUMBER 107TREW192568) which was brought on 29 October. you have not received the form for the £200 cashback which i sent to you. received an email but you advised that is only registration but why would you on registration form ask for my bank details and proof of receipt which i attahed to form.
i am very angry and so fed up with your company not happy me on this issue
how many customer have treated like this
the only reason i brought your product was because of the cashback.
hope you can help me with this please.
i have used resoler and been told by lg cant help me
i contact lg cashback promotion and they keep saying cant help because not received form