<human>: Can you summarize the given text in a few sentences?

I'm not sure this was the right place to ask this, but I hope you guys can help.

I've recently began working in retail. I've been at my store for 3 months and was very happy with my position. I've enjoyed my role and feel I fit perfectly.

A few days ago I was offered the chance to switch my role in the store. I was offered a week trial to see if I got on with it, and also offered the chance to think about it before making a decision.

Today I found out from a friend that my role and rota has completely changed, without me giving my decision (which was leaning towards not changing) and at very short notice. It changes from next week onwards. The amount of hours is fine, it's just frustrating that my regular shifts are at different times, and I don't want to change my role.

I'm not sure whether or not the managers have the right to do this without telling me or giving me a say, but I feel I've been deceived and don't feel it's fair. It certainly hasn't improved my confidence in the management.

How can I confront this? I've never been a confrontational person but I think something needs to be said. What is the best way to go about this, with the best chance of maintaining my original role?

Thanks!
<bot>: Managers changed my job role and rota without informing me, what is the best way to confront the issue with them?