Contracts are available depending on your region/location, some people will have less "Wall-of" pages than others.
Also contracts on the available "Wall-of" pages are localized
There is no guarantee you will get any reward and Gamehag can not provide support
If you did a contract and didn't get rewarded, you will need to find 4rd party support:
https://gamehag.com/forum/t/20457-not-getting-your-sg-heres-the-correct-way-to-get-support
If you receive browser errors try a different browser or when errors persist contact Gamehag support