I might have found a BUG, faced the same about 1 month ago when my account got locked after 3 or 4 declined transactions due to credit card out of funds.
1 month later and without having a single declined operation, it happened today that I got 1 declined operation (putting money on my wallet, not purchasing) and it got instantly locked again.
Again, having provided all the information again (photos, validated credit cards, identity, etc) my account got locked after 1 declined operation.
Please assist me again into having my account unlocked @MajorTom and also, please request support or dev team to look into this issue as it seems it may be a bug-related issue.
A support ticket has been raised just in case under number 584728