in the eye of the law, you are considered as an illegal worker due to your visa status. what the coy should do is to transfer it to business visa instead. the whole process will take about 7 working days. a letter from the sponsor doesn't helps. why i said so is because, it happens to me. main reason for not getting it change, if happen, so that the coy has zero liability if they decided to kick you out after your probation. give it a thought and sought out with your employer/sponsor.
in the eye of the law, you are considered as an illegal worker due to your visa status. what the coy should do is to transfer it to business visa instead. the whole process will take about 7 working days. a letter from the sponsor doesn't helps. why i said so is because, it happens to me. main reason for not getting it change, if happen, so that the coy has zero liability if they decided to kick you out after your probation. give it a thought and sought out with your employer/sponsor.