At the moment, Square supports only the US, Canada, Australia and Japan. This service is not available to other countries. That could be the reason you cannot view the link.
Most auto parts stores will check diagnostic codes for free or small charge. You can also purchase a tool to read the codes yourself (I have an OBD II reader...
El Capitan has disabled the Dashboard by default. You can re-enable it in the "Mission Control" section of the System Preferences menu. Click the "Dashboard" menu and select "AS Space"...
Yes, you can go on chat to 'speak' with customer service, but it is tedious and slow. They are also only available during the same times the live help is...
You can try to ask movie star planet for advise or to get your MSP account back by saying your username and the last password you can relate from that...