In the statement, the company's CEO Jon Eddy Abdullah said that the company decided to allow customers to call for compensation privileges until midnight of September 14.
Earlier, the deadline was set at August 31.
This followed complaints as some customers could not get through the busy call-in centres.
Abdullah said in the statement that the company has been closely monitoring the situation with regard to compensation.
"Today, a large number of customers are still calling in to register for the free minutes. Such large number of calls has inconvenienced many of our customers. Therefore, we have decided to extend the call-in period for another two weeks, starting from today until mid-night Friday, September 14, in order to make sure that all affected customers are well looked after," he said.
In the statement, Abdullah said "We would like to request that affected customers call our call-in numbers at their convenience. The service line will be available 24 hours from today until midnight 14 September 2012. There is no need to rush. I would like to assure you that all customers who called in between today and the next two weeks will be accommodated.
"We would like to reiterate that our top priority is to provide the best possible service to our customers. We stand by our promises. We listen to our customers and will always try our best to respond to their needs.
"On behalf of the people at dtac, I would like to apologise for the inconvenience caused. And, we promise to constantly improve our service in order that our customers today, will be our life-long customers for years to come."