Make changes in the store on Joomla

You need to make changes in the store on Joomla. The main amendments are:
1. Block "The most purchased goods";
2. Add the possibility of social comments on the site;
3. Make authorization on the site through FaceBook;
4. To refine the telegram bot (the bot itself already exists) so that it, if the consultant is offline, shows that the consultant is offline, since you have to read a lot of "wow" at the beginning of the working day :
5. And other work on trifles related to php and javascript.