It all sounds awful for you at this time. Can you go back to the food bank and stock up a bit more? Have you explained to your landlord that the rent will be coming in next week and that it’s just UC making you wait til next week? I think also you could get in touch with your energy providers and explain how serious your situation is, I’m sure they will top you up til you get some money in next week. Have you thought about going to your local church and asking them for help,if they can’t/won’t help they are a rubbish church but there will be other churches you could ask for help from that won’t be rubbish.