can you stop bombarding me with calls

I have stated this numerous times & i will say it for the very last time i hope. I will not make a debit order with you because you messed up my debit order when i started with you- i will pay cash untill i finish. however, i do not like being bombarded with calls- yesterday you called me more than 12 times for what!!! it's not like I am behind with my payments & i always pay before due date- these stupid calls telling me you thank me for the previous payment & confirming if i will make the payment the same date- I find them nauseating- you will have every right to pester me with calls if i miss payments- but i see no reason why! to even call me 9pm, really!!!<br> please stop with these calls. i ussually make payments round about the same day, i make payments within a couple of days after i get paid (25)- you can not be harrassing me like i am in breach of contract- really now STOP IT