Hi @Jazzmin1,
It sounds like you need to apply more force. Typically, in situations like this, I'd pop the correct-sized spanner on there and give the end furthest away from the nut a few swift taps with a hammer. These taps can help get the nut started. You can also try attaching the spanner at the nine o'clock position and then pushing down with your body weight on it or stepping on the end of the spanner.
Please let me know how you go.
Mitchell
Thank you for that i did what you said and it work it was hard but in the end it came lose x
Great, thanks for letting us know @Jazzmin1.
Feel free to post anytime you need a hand with a project around the house and garden.
Jason