Botched genuine iphone battery replacement

"Botched genuine iphone battery replacement: [...] went back to the same place, the repair centre has gone bust in December 2024 and was told to try the other 2 service place. I went to one, and they refused to replace the battery even though I was willing to pay for it. [...]So, less than 6 months of use, genuine battery parts, swell up again, cost me US$ 134, and no support. Very disappointed with Apple's appointed official service partner."

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Corroding iPhone Battery:

Take this as a learning experience, knowing to always purchase AppleCare+ for such expensive devices. But, I see this is an iPhone 12 Pro. So, who is the seller? If you get a new iPhone, get one from Apple. So, if not purchased anew, maybe it was doing this, before the purchase? Once Apple would have say in whether or not a device can be replaced, through use of AppleCare or AppleCare+.

"The phone was given to me, never been serviced at all, everything was still original out of the box. No parts were broken only battery needed replacing. It may be a defected battery, even genuine parts can be a defected part."

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A Time to Upgrade:

Depending on your location, Apple gives you a one-year, out-of-the-box, limited-warranty on all of its iPhones, when THEY sell it to you. So, take this as a good reason upgrade, purchasing it from Apple, and most certainly consider getting AppleCare+ with it, for instances like this. Service can be complete by mail.

Getting the Files Back:

As for transferring all of your data, I'm not so certain you could, being this has become a Health Hazard, resulting form a corroding battery. So, enable item in iCloud Settings, on the new iPhone, and be signed into the same Apple ID.