Resignation related

Dear sir, I have resigned a 20 days back - actually my probation is completed and notice period should be 60 days , company is asking me to leave in 30 days or with immediate effect and they will pay only for 20 days upto today like that , please check the below clause in offer letter and tell me - as per my knowledge they should pay my 60 days Gross salary I feel. Please let me know whether they are correct or I am correct. . Post confirmation, your services may be terminated by either party by giving 60 days notice period in writing or 2 months gross CTC in lieu of notice. However the Company reserves the right not to accept payment in lieu of notice and at its sole discretion enforce the notice period. 2. Actual probation is 6 months, but they have not informed me whether they confirmed or extende like that ... after my resignation only I came to know that Manager kept it on hold no am arguing that it is their mistake being kept it on hold either accept confirmation/ reject confirmation sir, so I am telling them that they should give 60 days. please tell me is that Legal what they are doing.. You will be on probation for a period of six months, which may be extended by the Company at its discretion. At the end of the probation period, your services with the Company would be confirmed subject to your performance meeting the requisite standards. During the probation period, Thanks, Ajay