suspended service's with no reason

On the 18th of August my mobile service had been suspended. i called the call centre and was given to speak to a very rude consultant his managers name was sidney I asked him to tell me what's going on he just said my payment was not made. But today the 28 August 2015 my service is back up and running I call up the call centre and the agent tells me the payment was done on the 31th but she does not know why it was suspended at all. Really concerned if this will be happening every month now. Angry and frustrated with my service provider as I can't get any sort of answers when I call the call centre.