What could be wrong if car will not hold charge after jumping it

What is your question?

I just have a quick question my battery went dead on Thursday I jumped it it start it went out of town for four days come back late this evening try to jump battery it will not jump I try for like 30 minutes thehead lights comes on the lights on inside car all that good stuff what could that be just by me telling you those things by any chance

How long has your 2014 Kia Optima had this problem?

Last Thursday