Erased my phone without notification or creating a backup

I recently took my Samsung Note 20 Ultra to weFix Cape Town to have my screen replaced however when I got my phone back they had completely erased everything that was on my phone for the last 2 years.

Besides wiping all my photos and memories they also deleted all my apps, including a password app with all my passwords and security keys to my crypto accounts. Some of which I still have not been able to get back and have lost with quite a bit of cash in them.

WeFix had previously this year fixed my screen on the same phone and backup up my data and restored it when I got it back. This time staff in the store admitted they had made a mistake and that it was their fault.

Now I have a phone back without my photos AND I have lost access to the money in my crypto accounts because they wiped my security keys.

The worst part of this is, I had not actually intended to leave my phone there on the day of the assessment. I had just planned to get a quote, but I was told as it was a policy claim I could not take the phone away as they've assessed it and in case any further damage was to happen I had to leave it there.

Normally I'd have done all the backups necessary but this threw me off as I had to leave my phone without preparation

I mailed the head office and they literally just said that their T&Cs state they are not liable for data loss and ignored my follow-up emails, even though their own staff admitted to negligence?!