Import data from Chinese account to International account

Hi, I have recently switched from a Garmin China account to a Garmin international account. I lived in China for 8 years hence the Chinese account. I now moved to Malaysia and have always stayed on the Chinese account, until recently after I received an email that I had to update my phone number. This had to be a Chinese number but I don't have one anymore. Garmin Support suggested to switch to an international account instead. I have downloaded all my data, created a new international account with another email address and tried to import the data from the Chinese account. This doesn't work unfortunately. It doesn't matter if I try all at the same time, or just one at a time. Support has looked into it and now say they can't help me any further. So that is just it then...? That's very disappointing. I had a streak of 1301 days of >10k steps a day which is now then lost? Is there anyone here that knows the trick? To be fair I am not worried about the activities itself - I just would like my streak back. Thanks a million!