Hi @mouse77 ,
Hopefully you haven't damaged the charge port and possibly caused electrical damage to the systemboard when you "it wont fit so i tried to showed it in". ( I assume that you meant that "it didn't fit so I shoved it in")
Use a strong light and a magnifying glass to examine the USB port.
Check that all the pins are there and that they are all straight and parallel with each other.
If the pins are bent or touching or broken this may be the cause of the problem and as I said, hopefully there are not more problems.
Firstly if the port is damaged then it will have to be replaced as it cannot be repaired and then after that further testing needs to be done to find out if there are any more problems.
If the charge port is damaged, here's a link to the ifixit Samsung Galaxy Tab Pro 12.2 Battery Replacement guide. It is useful as it shows how to open the tablet, so that access to the charge port flex cable is possible.
Here is a link to a supplier of the charge port. It is shown to give an idea of the cost of the part. It is not a recommendation to use the supplier. There are others online that may suit you better.
If this all seems to daunting, contact a reputable, professional mobile phone or laptop repair service and ask for a quote to repair the tablet.