what to do if you commit a sin in ramadan?

what to do if you commit a sin in ramadan and then you feel so ashamed to Allah that you can't even face him. like I cant bring myself to pray and ask for forgiveness because I asked Allah for forgiveness multiple times for same sin I make. I don't know what to do and how to bring myself to pray again. Are not devils locked up in ramadan than why am I making a sin even though I read Quran and pray 5 times a day but I still Made that sin made me hate myself. now I am avoiding salah thinking will Allah forgive me again? and feeling bad and ashamed in front of Allah.