How to deal with elderly when you yourself are not able to get around?

I am sitting here typing this while on my CPM machine and just got a frantic call from my 91yr. old uncle because he drove to the post office, left his car running while he went in and managed to lock the keys in the running car. Like I'm supposed to jump up and go fix it. I just had total knee replacement am on a walker and can't drive myself!!!!! I called my husband at his office and he has a wrecker service with a device that is supposed to be able to break in the car on the way. Called my uncle back and told him that someone was on the way. My husband is in the insurance business and knows how tight my uncle is, so he told me to tell Uncle that since he only has liability (21 yr. old car) the wrecker bill won't be covered. Good Lord, that totally ticked him off. The man has plenty of money, so not like he's going to be on starvation after he pays the bill. Seems like he's got one problem after another since I had surgery 2 weeks ago and my poor husband has to deal with it on top of his own 92yr. old mother and crazy sister. I know it is very scary that a 91yr. old is driving, but when I took him to get his license renewed a couple months ago, they didn't even give him a vision test. Really!!!!! I thought that was mandatory. I had prepared him for the possibility of giving up driving because he might not be able to pass the vision test. Now he's good to go for two more yrs. Yikes!!!! I am at my wits end. I feel like I can't even take care of myself because he is always needing something. I feel selfish for feeling this way. He isn't even my blood kin, but his folks are in another state and won't do anything for him. Thanks for listening to my rant.