Samsung galaxy A3 Charger unpurchasable?

[AC Question]

So I lost my samsung galaxy A3 charger along with the cable, somehow switched up with a new generation one and it charges too powerfully (you can cook on the phone, it drains extremly fast from 100%) and now I dont know where I can buy one. I'll attempt vodafone and some GSM but I dont think I can buy one. If not, what should I use to charge? Any help would be good, thank you!