No one should by one assist insurace for any phone. Review on OneAssist

I bought redmi 3s prime from MI.com during diwali sale. At that time it was avail able at discounted price of 8499 and as soon as  I was to check out and a stupid pop up came stating about the insurance and I added it to cart and bought as it was offered by mi. But after receiving phone I came to know from the mail  send by the insurance company that mi itself doesn't not offer insurance but one assist insurance in the name of mi insurance. After buying the insurance after a week I got call stating that he is representative of mi company and offering me 1 year extra insurance and I told him to send details on my mail but to my surprise it was oneassit insurance company calling in the name of mi. After that he went on calling again and again despite saying no. Plss read all the terms before buying insurance specially from one assist.