Please solve this question.

1. Square Limited- a renowned pharmaceutical company advertised a new medicine, "the COV-19 MED", with a promise that if any purchaser used it correctly, it would provide them with immunity from corona virus. Besides this, The Square Ltd. Company indicated in the advertisement that if a person used the medicine and still got corona virus, then the company would pay them Tk. 10,00,000. Following this Mr. Sayeed did get the virus after using the medicine by abiding by the correct guidelines. After recovering from the virus, Mr. Sayeed claims for Tk. 10,00,000. Square limited refused to pay stating that the advertisement was a mere puff.

Advice Mr. Sayeed whether he can pursue a claim or if the law is against him in the above scenario for Tk. 10,00,000 against Square Limited.