fn keys not working and not being able to shut down MacBook

I have a MacBook Pro 2019 and my fn keys are not allowing me to adjust volume or brightness. it has been a problem for a few days now and I researched to shut down my laptop, however when I did that my trackpad became unresponsive and I had to reset my SMC several times to get my laptop running and my trackpad was fixed but now I can't shut down my MacBook or it will happen again. my fn keys are still not working even after checking if the keyboard setting on the system preferences. if anyone can help, please let me know! thanks :)