I need help on to removing jailbreak I know that I have done an unauthorized thing and I didn't know that jailbreaking could be bad is there anyway I can remove it on my iPhone without using a pc?

I Am sorry apple for disobeying the agreements since i was a kid I always wanted to jailbreak my phone but now that i jailbreaked it the volume bar isn't showing.

I Been so jealous about everyone tht has jailbreak because they were able to get free items.Please don't punish me for what I have done. I regret jailbreaking my iPhone and shall promise to not do it again.