Stop spamming me! Please remove my contact details from your database!

Please can you remove my number from your databases. I've already managed to source a good insurance using your services back in March of this year, and I keep telling this to everyone that's calling me. Unfortunately I am continuously getting calls (13 insurance calls since this morning alone - it's now end of May!). It's really becoming frustrating now. All this only started happening after I submitted my details on your website for an insurance quote. Kindly advise as to how I can stop these calls from coming through and please remove me from all future sales pitches. I was pleased with your services initially, however, receiving 12 to 20 calls each day (even after accepting a quote) is just harassment now.