Fitness tracker Jawbone has sparked complaints from customers, after it appeared to have ‘abandoned’ its customer service as it deals with a “process of transition”.

Jawbone marketed itself as a rival to fitness giant Fitbit, selling wearable technology designed to measure users health and fitness. However, its customer care has been offline for several weeks, with both Twitter and Facebook staying notably silent.

Customer service lines are also offline, with a pre-recorded message saying that customer service was not currently available in the UK or EU.

However, a spokesman told the BBC customer care is “days from being back online”, adding that the firm was “in a process of transition”.

Jawbone’s problems have been obvious for a while, since the launch of its UP3 wearable was delayed by six months and had numerous build quality issues.

In February, the brand told TechCrunch that it intended to move from the fitness tracking market to healthcare technology. However, its wristbands are still being sold on Amazon.