[mothered]

and requested to speak to a supervisor or a senior rep.
She then told me that there isn't one available atm. I ask if I call another time will I be able to speak with one, to which she replied that only her and her colleagues are available, no seniors.

Complete nonsense.

First she said there Isn't a senior rep available at the moment, and then said there's no one on a senior level. Contact them again and "demand" your claim be escalated.

So I am basically still waiting on the photo evidence and the copy of manifesto, which was declined to me multiple times.

Please reply when you receive their response.

What are next moves here?

As per the first quote above.