Clientele Life Will not stop calling me

Ok i have a question? Can a person have the right to chance funeral cover if a person can get a better deal from a different place? I think that is part of a persons human right to pick and chose where you want to get cover that is best fit for your pocket. Hope that is 100% clear. Clientele Life keeps on bugging me to take out cover with them but i am no longer interested because i got better cover from Assupol. Luckily i have "True Caller" installed on my phone to block calls like that or i will be loosing my marbles soon. So what can a person do to stop them from calling me? If there is any help out there. So if there is somebody from Clientele Life reading this please take me off from you calling list please!!!!!! Thank you.