Maternity leave return to work

[Littleelffriend]

Hi all
I applied to go back to work part time . I asked for 2 days but said I would do 3. I was cut from 5 days to 4 before Christmas when I was pregnant. They refused my request in November but said they would review it at the end of February . They have said no again and have said I can have a Wednesday off, although this may change. Do I have any rights? I'm in Scotland