Dear Pailin,
If you are unsuccessful in your visa application, we would refund you the money. A refund would take up to two weeks.
You would be able to continue to a second programme, if you have been given a conditional offer of place and you meet the stated conditions.
Generally, a student visa allows a student to work up to 20 hours per week.
To get more information of agents in Thailand, please contact Chris Fei cfei@op.ac.nz, he will be able to assist you in this matter.
Kind regards,
Juan