No castscreen on LG G4c

Hi. Im no android genius or tech head but im no idiot either. Ive just been given a LG G4c for my works phone. Its great. Quick, good battery, great screen. Now, heres the but. Ive searched all over the phone for screencast option and it aint there. I called vodafone they saud call lg, so i did. They say that it impossible to to on this model and no software uodates are available. What a load of crap. So theyre saying that an top of the range, brand new to the market £400 phone cant screencast when a vidaphone 40 quid pay as you go phone can. Ive tried chrome cast, ezcast , mhl, apps. Everything i can think of. Please , anyone , help. Thank you Lokilex.