Non-delivery of Sunday Times yet again

Non-delivery of Sunday Times yet again - once again the paper is not delivered and when phoning they state it will be delivered which it is not. So, one does not know the entire day if one should go and buy a paper or not. They say they will credit your account for one paper, how does one know if it will be done or not. This is not the first time. It really appears as if they don't really want your business. Certainly, will not pay again.