From the official site of IRCC:Hello everyone, i need advice on proper documentation to submit for study visa, i recently got an admission for fall 2019 from Sheridan College,for Ontario college diploma for 2years, in Business (finance), but i am graduate of internal auditing and currently a permament residence of South Africa,i dont know if it possible for me to use another person that is not family related to me to sponsor me and provide his company business bank statement and how will he write the sponsorship letter,please advise me,
https://www.canada.ca/en/immigration-refugees-citizenship/services/study-canada/study-permit/prepare/get-documents.html