Phone harassment offening loans 24 calls in one week!!

I am not even a client but am being harassed by them trying to give me a loan. I have had 24 calls this wee**** Two so early I hadn't even woken up yet. Have installed true caller but they use different numbers. And all this started after I entered a few online competitions and gave my name and number so they are buying details from one of these companies. I am sure this is ******* and it is certainly *********. I said I wasn't interested after the first call!!!!!