No pro rata !??

This insurance cover , the 1st month I took out a policy with them, it was the 7th. As per norm , I expect to be covered from the 7th to the last day of the month ( pro rata .) But they said their system doesn’t give pro rata . So it means I paid for 6 days that I wasn’t even their client and wasn’t covered for . Whoever was assisting me just said “the system doesn’t allow “. And no landline ? Only watsapp chat ? What happens if I don’t own a smart phone ?