Help Tebex setting

Hello in English, I speak very poorly (Google translator). Hello, I’m tired of looking for information about how to set up tebex correctly. for 2 weeks I have been getting Mut in the discord, but I don’t get a response in the comments on the forum.
I set up the store, entered sv_tebexSecret in the config, and it is confirmed on the site.
I made two commands specifically with hexid (steamid), but when buying a package, they do not work, the console does not display any information, I will attach files with commands below. Please tell me what I’m doing wrong? or where to read the guide with detailed and up-to-date information?