Kroger and Certegy review: Kroger refuses to cash one of their money orders

My landlord contacted me explaining that Kroger was declining to cash the money order this month. The next day we both went to Suwanee Kroger, at this time, we were given a number to contact Certegy. I ask the manager the reason for there being a problem after I paid them $770.88 in cash for a money order, and my landlord is unable to get it cashed by Kroger. This decline to cash the money order after I gave them my cash for payment was unacceptable because now my husband and I can be evicted because my landlord has not received her May's rental payment from the money order that I purchased with cash from this Kroger. Kroger has defrauded my husband and I out of our money and has put our housing in jeopardy for no reasons given to us. Kroger has no postings that are visible explaining that purchasing a money order from their money service does not guarantee that the receiver of the money order will be able to cash the money order.