Ipad Pro doesn’t charge constantly

Hello, i have an issue with my iPad pro that it doesn’t always charge, unless i try to move the cable up and down, i have to use a third party cable as the original type cables don’t work currently. The problem started all of sudden after i used a third party adapter for charging and headphones, i used to use it before with no problems but this time i had this issue, and it’s been a month, my ipad charges but with specific positions of the cable, what do you think the problem is? And is it possible to replace the charging port? Cause I heard that apple doesn’t offer such a choice (my device’s coverage is expired).

thanks in advance.