Unfairly dismissed on my first working day - Store Manager Mango Employee Review

I was hired there as store manager and on my first day they humiliated me and dismissed me because someone outside of the workplace told them very serious lies about me I was not given time to prove it’s untrue I was sent home. - HR is very unresponsive totally ignoring you when trying to prove my innocence - company overall isn’t responding to any of my emails - company never asked for reference from my employers they believed someone’s lies who contacted them - they don’t even apologise for their mistake very unprofessional and disgusting behaviour