Seamaster 2937-1 problematic oxidation

Hello everyone,
I'm new to your forum and an Omega fan. I didn't see if there was an introduction page, but here's my problem: my watchmaker just serviced and re-plated my small timepiece that I bought last year. Unfortunately, the new plating is coming off. According to my watchmaker, the case is oxidized from the inside. I wanted your opinion and to know if a replacement case is readily available.
Thank you.

Thank you for your feedback. Apparently, he tried to apply a bit more pressure to the copper layer to fill in as many imperfections as possible. He told me the metal was soft, which is possible if it's oxidized from the inside. I'm looking on eBay, but I think, as you said, it's likely to take a very long time. In short, I'm disappointed because I have a nice patinated dial and a serviced movement, but a non-functional case. The case reference is 315.164. Do you think I could find this part on this forum?

Thanks for the clarification. I don't think microsoldering would solve the problem either, plus the prices are very high due to the enormous amount of preparation work involved. What do you think about sending the case to another company to have the plating redone?