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Thank you for your enquiry.
Re:2nd visa granted - If when your college lost their licence on 12th October 2011, your visa would have been curtailed. The Home Office will take the date the curtailed leave expired and not when you left the country. The time counts from when leave is granted and not when you apply for leave. Your 4 months calculation is not correct.
Re 3rd visa granted - The time counts from grant of leave to curtailment date.
Once you have rated my first answer I can answer your second question.
I am sorry what you are asking for is beyond what I am allowed to provide in terms of support. I have given you the information you require to work out for yourself the time you have spent in the UK. If you want precise times you will need to seek independent legal advice.
You would find that JA rang you for over 15mins i was on the phone. Your question has been answered.
I did not make the call personally as I am not allowed to. JA made the call through their switchboard. It rang for over 15mins. I was on the phone waiting but no answer. Your questions have been answered any way so I am not sure I understand what the problem is
Sorry I am unable to assist you any further.