Yesterday when I wanted to access my wallet, for whatever reason, I couldn't remember my password, so I thought, no issue, I just can re-enter my wallet using my 12 words, so I did. I tried to recover my wallet with these 12 words and I was given 'another' wallet (another wallet ID I mean). This worked but now it would only contain one of the two addresses I had. The address with the funds in it (0,28BTC) is no longer there?
And this is precisely the reason that Electrum does NOT let you import private keys into a seeded wallet...
You have restored an HD wallet, but your 12 word recovery phrase, was only backing up the wallet address with no/little funds... It would appear that the address WITH the funds was an imported private key that is not able to be recreated by the recovery seed.
There is one thing you should try before giving up tho... try using an OFFLINE copy of:
https://iancoleman.io/bip39/Put your 12 word seed in, click the BIP44 tab and then have a look through the generated addresses looking for one that matches the address with 0.28 BTC. I would probably not bother looking any further than the first 100.
If you don't find them there, change the "External/Internal" value to 1... so the Derivation Path should read as m/44'/0'/0'/1 and see if you can find the address there... again probably not worth looking past 100.
If that doesn't work, you'll probably need to contact b.info support and ask them for assistance.