I'm no expert, but I will offer what I have experienced and observed in my many years in the workforce.

It all comes down to who has the power. If you have a powerful ally, then usually just about anything can be resolved. But if you do not--best to pack your bags and move on.

It seems to me the Team Leader has told you quite plainly to move on. Is it fair? No. But nothing in the workplace is fair, in my opinion. What I have seen your Team Leader say to you (what you report here) would most likely not be considered bullying. Now, that said, yes, some people in supervision will say even the most mild comment in such a sneering tone, you know they are being hostile--but to report what they said? No way to prove their delivery was hostile even if you record it; if a company wants to ignore the tone, they will. If she says "most people stay 18 months" she could always claim she was merely stating a fact. She could claim by saying "move on to gain further different experience within other services within the work company" <-- she is offering a solution for you to benefit from other services.

While you are looking for another job, is there a way for you take her up on moving inside the company? You could say that upon reflection, you like that idea and how can she help facilitate your move within the company? She may refuse to help you with some jacked up excuse; so whatever mechanism there is where you work to move you should take advantage of--while you are looking for another job.

It's hard to show ill intent if there are two or more people who back each other up: your Team Leader and the manager she was talking to on the phone. Again, I know it isn't fair. I believe they will eventually reap what they are sowing, though.

And I would go to my GP and seek counseling and make sure they know that you did.

The point is, that if you follow all these things she told you to do--while you are looking for another job--she can't later say you ignored what she said to do; she can't claim you are not interested in "doing better."

I hope this helps.