Totally ridiculous number of calls per day

I CANNOT TAKE THIS ANYMORE!! I have a loan with FinChoice and I've skipped one month's payment a while ago. I made arrangements before the end of the month and then paid the agreed payments WITH the normal installment. I receive a minimum of 5 calls per day to remind me to make payment. I have asked nicely to make notes, I've been a bit rude and that's totally not my nature but for goodness' sake!! If I made arrangements and I stick to it leave me alone!! This is ridiculous and a waste of time and I actually feel like I am being attacked. Please for the last time after numerous emails and phone calls, call me and harass me when I DON'T pay my loan, other than that leave me in peace to do my work so that I have money to pay you back at the end of the month without being rude.