You can't trade one card.

No, only TF2 Mann Co. Supply Crate Keys are used in this case.

Today the bot doesn't have any sets that you haven't craft yet.

The bonus has been added.

Use “BuyFoilGems 1 603780”.

If on the Trade History page (Not on Trade Offers page) you see a trade with this bot (Ellesime Level Up Service), please open his profile and make sure it is really this bot.

If you only see a canceled trade offer on Trade Offers page, then the bot did not receive your keys.

In case, during the trade, the Steam server worked with errors, the keys will be returned to your inventory. Try to do any trade with CSGO items to speed it up.

Hello. It looks like you have trade your keys with someone else.

Please go to: Your profile > Inventory > Trade history
Check who you have exchanged your keys with.

Yes, you can. Use “BuyGems 1 603770” or “Swap 1 603770”.

Type via SteamChat “BuyGems”. You will receive 1 set for every 410 gems you have.

Use “Level 100” to find how many sets / gems you need to reach a specific level.

Buy gems on the market: https://steamhost.cn/steamcommunity_com/market/listings/753/753-Sack%20of%20Gems (1 Sack of Gems = 1000 Gems)

Keys returned.