Hello,
I have a problem with restoring a paper byron wallet of 27 words. After the recovery, the wallet balance remained 0, although it should be 1000 cardano. The wallet was created in September 2019, I am sure that the recovery phrase is 100% correct.
I read on some forums that this may be some kind of glitch and to restore the balance you need to send 1 cardano to the wallet or create an additional wallet with a new shelly version?
Which software did you use to restore the wallet? If you used Daedalus, you might want to try adalite.io.
If this doesnt work aswell, id recommand you contacting the IOG support https://iohk.zendesk.com/hc/en-us