You can't add the information. However when you signed up there was a forum account automatically created that holds that information, the username for that is: vladimirgavryusev71
Using this account for support would be preferred for ease of looking the account up, if you prefer the current you need to remember to include details, either username or the domain.
I have increased your disk space.
Do note though that your cache folder in wordpress has grown rather large, it may be wise to clear it from time to time, depending on what you use for cache functionality there should be an option to clear somewhere in your settings.
Also, you have hit the limit on Inodes, this is not something that will be increased on free hosting. Any file/folder (including saved emails) will contribute to the Inode count, cache functionality often consist of a large number of smaller files so I'd say it is highly likely that it is a major cause of that part of the problem.