My iPhone has been temporarily bricking for half a year

Model 6s, 16gb

By temporarily bricking I mean that for four-six hours it is completely useless, can't turn it on or off, can't reset it, plug it in to charge and nothing happens. Then magically it works again after four to six hours.

At first it was spread out and I shrugged my shoulders about it. Now it happens every single day. I tried getting help directly from Apple but keep getting an error in the middle of getting in contact with someone for some reason.

Before asking yeah I read the article Apple has on it, it was not helpful which is why I'm here.