Iphone won't charge and won't turn off?

Basically my iphone won't charge properly, I have to keep unplugging it then plugging it back in around 20 times for it to charge, also when I turn it off it instantly reboots itself. At first I thought it could be because of water damage as I had it in my pocket when it was raining, but I've checked both LCI's in the earphone jack and charging port thing and neither are red. I don't think it's because my charger is broke either as its about a week old. Also had problems with sound constantly going off with both speakers and earphones and the lock button seems to not work occasionally. What could I do?

Hold the lock button and back button together for 5-10 seconds and it'll reset

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