I have resigned from my company 25 June 2018, giving 4 weeks notice. I started employment on 1 July 2017. My initial contract states I have to give 2 months notice after a 1 year service. I resigned before a year service. I signed an addendum to contract in May which increases my salary, 42 working hours per day and 20 annual leave and 2 months notice and states that all other conditions of employment as stipulated in initial contract remains same.
I never received the 20 annual leave I only have 14 days annual leave. The company acknowledge my resignation 9 July 2018. On 10 July they sent me an e-mail saying I should work two months notice and if I don't they'll take legal action and deductions shall be made from salary.
Is this all legal and fair?
Addendum effective from 1 March 2018, was signed 5 May. It also states if i should not raise any questions within 2 months time frame I'm in agreement with contents of document.