Bad customer service

I've ordered some bedding on line a month ago it was delivered to the store but I have not collected it from the store yet. The collection department keep on phoning for payment almost everyday & now even at night. what ****ed me off is the fact that I did explain to them that once I collected the bedding from the store I will start paying or even settle the account. Still they keep on phoning even sending messages. I just feel once you've explained your side of the story why did they not confirmed with the store. my personal opinion is why pay for something that you don't even have in your possesion yet. I think the way in how they dealing with the matter is unacceptable and clearly not good business practice. Being a customer for so long I just feel they can closed this account.