Am I expecting too much?

So a few months ago a brand new renata battery exploded in my tc1 and the watch no longer works. I contacted Renata, the manufacturer of the battery and also owned by Swatch; they intially offered no help.
I contacted Swatch and they told me to send the watch to the service centre in the UK to have a look at the watch.
The service centre informed me that they no longer have the parts and could not help me and sent the watch back to me.
I suggested that the cost of the watch could be reimbursed to me and I would find a replacement at my own risk.
They said they could possibly repay the money if I could provide an original receipt for the watch. (So basically; bugger off. The watch is from 1976)
I feel this has dragged on long enough and I am getting no where. The damage was caused by a faulty battery, it happens but I also feel that it is unreasonable that I am left with a non functioning watch and they dont seem to care about it.
Renata originally said if I post on Omega Forums they definitely would not be able to help me. They eventually offered to pay for the service but I can not get it repaired with original parts so they won't pay.
I feel this is very poor service from Renata and Omega and that they could do more to accommodate my loss. But perhaps I am expecting to much?

forgive me but what the heck is a "tc1"?

Omega LED watch

Right, aren't non-disparagement clauses now banned (at least in the US)? That might be a lever to pull.

Are you sure the root cause was the battery? Was the battery overloaded by a faulty watch? In need of service after 40 years. Just curious how you determined the battery failed?

Yes they wrote it in an email to me

I will contact renata to see what they say, but they have not answered any of my recent emails.
It is possible to get a replacement movement and it is not really expensive, around 100 pounds. My only issue with this is that it no longer has an Omega branded movement in it. I know they were never Omega movements as such, they were made by pulsar and an omega badge was placed on them. As a collector I feel this would impact on the value of the watch should I ever wish to part with it. As we all know, originality is a big deal for watch collectors so it is a factor for me too. That said, if they continue to refuse to remedy this problem then I will get a replacement movement.