31 weeks pregnant, if i leave my job will i get income support or will i be disallowed?

Hi, i was wondering if someone could help me. I'm 31 weeks pregnant and on maternity leave. I'm having problems with my work and wages, they are messing me about with my wages, there is hours they are owe me and say im entitled to but aren't paying me them because "it's the way the company works" i get no satisfaction when i try to resolve this and i get no satisfaction with my union. I am totally stressed out with all this and want to cut ties altogether with this company but will i be able to claim benefits if i do quit?