TalkTalk customers now have until tomorrow (January 7th) to claim their free upgrade offer, which the provider launched to compensate after suffering a major security breach in October 2015.
The initial deadline was December 31st, but has now been extended, although the provider has decided against informing customers of the change directly, choosing instead to make the announcement via its website.
As many as 157,000 customers are thought to be affected by the breach, which saw hackers access bank account information, as well as credit and debit card information.
TalkTalk is currently under investigation by the Information Commissioner's Office over its alleged delay in reporting the breach, which is expected to cost the company tens of millions of pounds.
In an attempt to keep hold of customers, the provider offered a free upgrade in the form of free Sky Sports for three months or a SIM card with a 100-minute, 250-text and 250MB monthly allowance free for 12 months.
However, a number of customers have complained that lengthy call times have meant it is too difficult to claim the upgrade, with the Daily Telegraph reporting that some customers had been unable to sign up online.
A TalkTalk spokesperson responded by telling the newspaper: “The free upgrades are intended as a small gesture of thanks to our customers for their understanding during a challenging time, and of course we want as many of them to take it up as possible, which is why we extended the deadline.
"Information about that extension is, and has been, available on our website and phone lines, however we’re sorry that some customers who contacted us directly were given the wrong information.
"Customers can still select their free upgrade by logging into MyAccount or calling us on 0800 230 0403."
TalkTalk has also insisted that the upgrades will not be "auto-renewed", meaning customers should not have to worry about any extra charges once the free period ends.