My employer failed to confer performance bonus benefit claiming that I have not concluded the 2016/17 performance contract. The contract was never concluded because the supervisor failed to respond to the proposed KPIs and targets. Numerous attempts ranging from a series of reminders, requests for invention including the extreme measure of lodging a grievance with the employer proved unsuccessful. 2016/17 financial year ended on 31 March 2017. After I challenged the Employer's reasoning for not awarding the bonus, the employer then resolved to enter into a contract with me retrospectively. I reluctantly engaged on the highly argumentative exercise which took more than three hours without completion as both me and my supervisor are coming from much divergent views on the expected KPIs and targets for the period concerned. After the session, I sent an email indicating that setting targets post delivery prejudices me as such do not with to continue with this exercise. Unfortunately, the organisation insists that I should give the process a chance but I feel the entire practice is unfair and wishes not to engage in this process but to escalate it to the CCMA. Please advise.