shop nbc credit dept checked my credit and denied me credit and after 6 months of timely auto payments they refused me eden prairie Minnesota

i have been shopping with these people for over 6 months bought many items on value pay with out issues  then all of a sudden now  we have issues no credit with them or value poay allowed at all    without issue on my part.no explanation and no notice even though i have proven track record with them , they will not allow me any valuepays anymore . it was not expected and there has never been an issue as i had several items on value pay at the same time Now all has to be paid in full