Help poor children with sick mum

my sister is seriously ill in hospital i have my neice and nephew but cannot access the bank account for any child benefit and child tax so have had to put my own claim in for them i live on 372 a month im doing the best i can but have no friends no family and no helpfrom all the charities and now churches no1 has helped at all and we honestly have no money left im scared and so terrified im going 2 lose the babies i know its an extremely difficult time for every1 but please every little helps these babies cant see or even speak to there mum n havr bever been apart from her until now shes not only fighting covid but also cancer as well please any help will do any amount no matter how small simce this page went up claris recently died early hours this morning the children have not been told as we have no idea how to come to terms with it oirselves how do we carry on we only had each other how do i give her the funeral she deserves i just dont think i can carry on any more 😭😭😭