This is a great app.
Note down the complaints and issues and take it one step at a time.
Whatsapp didn't bring us voice calls in 2011 even though we needed it back then.
Take your time and grow gradually.
Also, find a way to monetize.
1.) Since its free, how do you get a lot of people to use it? Say, daily commuters (BRT ads and Facebook (specific location ads that Lara handles) is a smart way to go.
2.) How about having offline stores in specific areas list their products and get found by commuters. (E.g - moving from Yaba to Surulere. HINT: There is a great restaurant with Wi-Fi around Adeniran Ogunsanya where you can hang out while you're in Surulere.
Just my thoughts but I think you have a great product. Take your time to grow it.