Okay have worked and increased the sales in Ontario, by an overall average of 47.7% for 4 years running. I have been employed for 4.5 years at this firm!
They offered me 20 weeks of working notice... But I can say anything about this to our customers, who I have known in some case's for over 35 years. Do I need to complete the term of April 29th to receive my wages

Generally speaking, yes, you do have to continue to work through your working notice period. If you don't, it would be considered a resignation. Oftentimes we are able to negotiate exit packages in these kinds of situations. It is also quite possible that 20 months' notice is insufficient as a severance package. Use our Ontario Severance Pay Calculator (www.severancepaycalculator.com) to find out how much you may be owed, and give us a call at the number below to discuss your situation in more detail. We would be happy to help in any way we can.