Do you recall that the mistake was from your side? Otherwise you can hire immigration lawyer and he can fight for you that mistake was not from your side. It is IRCC mistake to send you wrong name in invitation letter. My suggestion to get legal advise on this.Any idea how i should proceed.
Follow this link
https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=1356&top=14
good luck......
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