I've been working in a firm for the last 3 years. Two weeks ago, I interviewed for a position in a new company and was selected.
My current employers notice period policy is either 2 months notice or 1 month notice plus the loss of a months pay.
I had clearly mentioned the 2 month notice period to my new employer. They were okay with the 2 month notice period and asked me to confirm the offer letter. Now I have resigned, and the new employer's HR is asking for me to join within a month. However, this is not possible for me at all due to my responsibilities at my current workplace.
How can I communicate to my new employer that I am not able to join within a month for the agreed upon reasons?