The ad follows the couple in their pursuit of the man until they finally catch him.
After wrestling him to the floor, they reveal that they didn't want him to leave the shop because they knew he would not be back for a while.
The ad is the second phase of T-Mobile's "pay as you go" campaign, and is supposed to demonstrate that T-Mobile top-ups last longer than those offered by other operators.
The TV ads will be supported by outdoor, online, cinema and in-store activities, with media planned and bought by MediaCom.