When typing in the 24 vault seed words be careful not to include a space before the first word or after the last one. It should all be in lowercase and not include any numbers, only words. Make sure the spelling of your seed words is correct.
Here is a list of all possible words that could make up your seed words - https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt
If you are unable to unlock your vault or recover your vault, we are able to do a vault transfer so you can gain access to your vault again. If you would like to open a ticket please email support@worldmobiletoken.com.