Is it obligatory to offer expiation for an oath (kaffarat yameen) after swearing not to purchase on credit from an establishment, and then dealing with it on credit again?

The Prophet (peace be upon him) guided his Ummah that whoever swears an oath and then sees something better than it should expiate for his oath and do that which is better. If dealing with this institution on credit is better and more beneficial, then expiate for your oath and deal with it. If you have already broken your oath, expiation becomes obligatory upon you, which is feeding ten poor persons or clothing them, or emancipating a slave. If you are unable to do so, then fast for three days, and it is more cautious that they be consecutive, in accordance with the Almighty's saying: "Allah will not impose blame upon you for what is unintentional in your oaths, but He will impose blame upon you for what you intended of oaths. So its expiation is the feeding of ten needy people from the average of that which you feed your [own] families or clothing them or freeing a slave. But he who finds not [the means to do so] - then a fast of three days [is required]. That is the expiation for your oaths when you have sworn. And guard your oaths."