First off, please don't post this in Strategies. Secondly, please don't make a new topic for every problem that you have. We have a topic for General Q&A for all of your MMRPG needs right here, so post in that topic next time you're having trouble.
That being said, welcome to the MMRPG community! Let's address your problem. I'm not sure, but I believe that you must complete all 3 campaigns in order to unlock Kalinka's shop. Have you done this?