Agree with the suggestion. The incorrect savings amount could be one of the issues. Remember that it is liquid savings available to support travel that is important but also total amount of assets and savings. It would not make sense for someone to spend a good portion of their savings on a trip to Canada. The fact that your father lives and works in a 3rd country could be a stumbling block. It creates issues proving strong ties to your home country. I would make sure to explain that the consultant incorrectly indicated the savings amount and include proof of the previous statement so there isn’t a large increase in savings that is unusual.
if you are applying on your own without any invitation from Canada its the toughest visa to crack. house and farming land in Punjab is a common thing .... everyone has that. start thinking from visa officer's perception - why would he give visa to your parents ?