Is the OTA Oréo update available ? and When can I receive it in my a5 2017 (UAE) ? Please advise. You have to care yoir customore.. thank you

Suddenly stopped fast charging and charging very slowly.  Phone 8 months old. No damage. Nothing happened. Fast charging on. Don't really want to send it away. Quick fixes please. Could it be the charger? How would I know? Please advise. You have to...