Screen time detox

My 3 year old twins are addicted to the tv. I didn’t want it to be this way but I’m a single mother with no help & they’re with me 24/7, even through my work hours 9 hours a day. They can play but nothing holds their attention for long. They always end up begging for tv & I end up giving in. I was sick with covid a few weeks ago & that’s when I really messed up with screen time. That was the only way I could get any rest & now it’s a daily thing.. they watch for at least an hour a day. There’s only so much I can think of for them to do.. I even went out & bought new markers & play dough & magnatiles & blocks.. just hoping something would entertain them. I’m exhausted & idk how to get them to entertain themselves because when they do play, they always want me to play too. What do I do??