Flat bottem wheel and key fob

[Scrapy]

hi guys brought a audi a3 1.9  it has the flatbottem wheel noticed there no lights on it and the controls dont work is there a way to get these working i dont think anything else was replaced think the guy that i brought it off just swapped the wheel over... and also my keyfob the unlock button dont work properly unless i take battery out then put it back in i get one unllock and tba its falling to bits i have had a look on eBay for a replacement is there a certain one im looking for or whats the easy way to repair it