How much does it cost to get the charging port fixed on a iphone 5s?

My phone has to be placed in a certain position otherwise it won't charge at all. I have to manufacture the cable a certain way for anything to happen. The charger is fine, I've replaced the charger twice now and I have tried to clean out the charging port gently with a toothbrush. I'm wondering how much it'll cost to get this fixed?

Thanks