Apple play

[Dave vw]

I have 2015 2.0 tdi vw golf

I can’t use apps and voice, as I need activation key. Would like to use apple play on car and voice commands for phone. Been told It cost about £400 from vw, and a cheaper sd card from vision coding voids any warranties. 
want to be able plug phone in for charging at times and use wireless at other times. Looking for cheaper options 

can you please help or direct me to someone who can. 
thanks Dave