My XZ premium suddenly stopped charging one night.

I was able to use the phone until it went to 0% but I was unable to charge it again. I have many most important files and pictures in internal storage which I'm unable to retrieve now.

I replaced the charging port and tried new charging cable. But it didn't work.

Can anyone advice if it could be a problem with Power IC? I tried contacting support, they said it would cost $200 and 5 weeks lead time. I absolutely needed to get back the data while I'm waiting for my new 1 ii.

Please let me know any cheaper option for repair or could i charge the battery externally and insert back in? Any advice is appreciated.