Our flight from the DR to Miami (#1026) was delayed for hours because of a maintenance issue. As a result we missed our connecting flight to SFO. The booking agent in Miami was matter of fact: stay overnight in Miami and maybe get on the flight to SFO the next night or take a flight in four hours. We had been up since 4 am and just wanted to end this airport fiasco. We asked about transportation once in SFO as the BART stops working at midnight. The manager, Luis, said they would pay for for a Super Shuttle. The connecting flight (#1586) was delayed for an hour, causing us to arrive in SF about 1 AM. The AA agent in SF said that Super Shuttle stopped running at midnight, leaving us with the option to put our 70+ year old bodies on the airport floor until 5 AM when BART started again or to take a taxi. This helpful agent gave us an address to send our taxi voucher to AA for reimbursement, assuring us that it would be paid. Now AA refuses to pay the $100. It seems preposterous that they would have gladly paid for an overnight + meals in Miami, but refuses to pay for this voucher. Would they expect their grandparents to sleep on the floor?