Refund without asking

On 4th December 2015 our telephones were hit by lightning On the next day I reported the problem to Telkom at the local store and the following week the fault was repaired. Considering the number of customers that were affected in the area I believe this was excellent service. Today I received my account and noticed that I have received a credit for the period that the service was not available. This credit was app**** automatically without me asking. It would be nice if other suppliers could follow the example set by Telkom