The company isn’t accepting buyout option and forcing to serve notice

I am willing to serve 30 days notice and buying out the remaining days. But the employer is not agreeing. Below is the contract statement used by them. “In the event of the company deciding to terminate your services at any time after confirmation, the company shall give you 21-days’ notice of termination or 21 day's salary in lieu of 21 days’ notice. If you desire to leave the service of the company before or after confirmation, you shall give 45-days advance notice, or 45-days salary in lieu of notice period of your intention to leave the services of the company. The company will not permit adjusting your leave towards notice period. However, it shall be open to the company to waive the notice period unilaterally and accept your notice of resignation as itself. Such acceptance of your notice of resignation as resignation itself by waiving the notice period shall not be construed as termination by the company.“