I also called and got an answering machine when I wanted to know if my 2 year old was also allowed a stroller (go figure - a free child gets a stroller but a 2 year old it has to count as their luggage). So I called back a WEEK later (after the message said that I would be guaranteed a call within 48 hrs) and said on the machine that I called a week ago and my call has not yet been returned....and I got a call back 2 hrs later.
I don't know how long ago your trip was, but you should try to get your $$ back for the seat selection!!
I had the same experience with the voicemail before we left. I left a message 4 times and finally called the head office. They couldn't help me, they said that they could just transfer me to the same line and I could just try again.

I didn't bother. I sent an email and they finally responded. Although, it was a rather abrupt response which basically didn't answer my question.
I also had the same issue with a car seat for my daughter. We are renting a car and I wanted to take a full back booster seat for my daughter and I was told that it would be part of the luggage allowance. I did mention to them that it didn't seem correct that my paying daughter wouldn't get the car seat or in your case a stroller for free as most other airlines do. No response after that.
I hope I didn't make you nervous. I'm sure it'll be fine. I do think that if getting seats close to each other is important to you, I would pre - select the seats. In my case it was very important. They did not try to separate us on our return trip, just tried to give us worse seats (in my opinion). I just don't understand why they didn't have our names on those seats. I'm just angry because there was no reason to give us other seats since the seats we purchased were available at that time.

I just don't understand why it was such a big deal giving us back those seats. When I told her I purchased the seats in advance, she looked at me like she didn't even care. She sighed and began changing the seats, like I had asked her to move mountains.

It's just AWFUL customer service.
The flights, on the other hand, was on time and great. I didn't find the seats small. The lunch/dinner they offered was nice to have, although we ate before we boarded. I'm not a fan of airline food. But it was not too bad. And I don't even know if any other airlines offer meals anymore. So that was fine.
It's just the unpleasant experience with the customer service before, at check in (return) and after. I really don't like flying, so I try to get the quickest possible way to get there with minimal connections, but sometimes it doesn't seem worth all the hassle of having to deal with companies who don't seem to put any importance in customer service.
By the way, I didn't even bother with trying to get my seat selection refunded since I cannot stand the hassle of dealing with them again and plus, although they did not handle this situation well, I did finally get the seats I purchased.