REFUND

I have cancelled my car insurance for over a month and they said I will get my refund after 14 days,I did not get my refund after 14 days.I called them to check where is my refund and they told me I will get it after 72 hours there was a system error but they,After 72 hours I did not get money and I called them the next day and they said they had backlogs but now my refund has been processed and I will get it after 72 hours again. After 72 hours I did not get my money and I called them again on Monday and they said I will get again after 72 hours and today as I am writing this the third 72 hours has passed and i did not get my refund.Please advise if I can skue them for playing with me.I have proof of cancellation and voice recordings as well.I am tired of this because I need to pay my child school fees by Friday and they are not helping at all.I want to sue them so they can never do this to anyone anymore.