Hello @RP_18_ ,
Welcome to the community,
You can buy one, but just make sure it is not some cheap one, that could overheat or cause a fire, depending on what phone you have, will depend where you can get one.
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using web based app or another phone: +44 800 079 8586 or +44 800 956 6000.
