Kinda overselling this, aren't you? Ease up on the hyperbole a little.
You can still commute to work. No one is stopping you. They have only just spotted you on their radar, that's all, and are now tossing out roadblocks.

GO talk to somebody, it might do some good. Use your gut instinct as to whom. You never know if you don't try.
Pursue whatever avenues you have with it, short of coming off as an obnoxious, spoiled intern. Use good judgement and do the right thing. As a prerequisite, read something by Lou Holtz.

But if none of this helps, suck it up and keep the bike outside. Get or make a cover of some sort, if you think that is needed. Do what it takes to achieve your purpose and don't whine about it.

Life is a ***** sometimes... and people sometimes suck.
Consider this training for the real world of work to come.

Above all else, smile and never let 'em know they've gotten to you. Take that to the bank.