Data Card Repairs

On the 30th November, I approached Vodacom Gateway, to hand in my data card wifi device for repairs. The battery started to swell and back cover does not close. The vodacom representative took my device in and handed me a receipt with the below sequence number ********** . I was advised that in three days i would receive a sms confirming that my device would be delivered for repairs and by mid December i should receive a response to state that my device is sorted. It is more than a month later and i have not received any sms and no one has contacted me to advise of the progress of the repair. This is poor service!