I believe my mother has cancer but the NHS are not taking her in

Hi, I am a 17 year old in sixth form and recently my mother has been incredibly ill. She has symptoms such as weight loss without eating, breathlessness, bowel issues, bleeding and others. Furthermore, she already has a artificial cardiac pacemaker in body. It is really angering me how she is trying so desperately to seek free support yet they are taking so long to get the help that she needs. I don't understand how the diagnosis process really works, nor do I know the specific type of cancer she possibly has. Right now, I know she won't be able to work until the end of the week because nobody is providing her with the help she needs. I can't find a decent job because the job market is garbage right now, my father works minimum wage and my brother has no work experience so he can't find a decent job either. My mother desperately needs help and medical support but nobody is doing anything to provide it to her and I feel like it'll be too late by the time she does end up getting help. I think it's ridiculous what the government of this country has allowed it to come to, and I don't blame the doctors or nurses because they're trying their best. Is it too much to ask that an incapacitated person should receive immediate medical attention when they need it?