Lack of technical support and no refund

I am absolutely disgruntled after the experience I've had with Guess. I purchased a Guess Connect Smart Watch on 31 December 2018 - the sales assistant advised us that should we have any issues with the watch, they have a technical support team which would be able to assist us at any time. 6 and a half months later, I have a Guess Connect watch which is does not switch on and cannot be repaired due to the brand relying on a 3rd party technical support team (they are currently transitioning to another company) to assist. Upon learning that Guess does not have their own technical support team, I decided that I was not happy with an exchange as once my warranty is over, I could possibly be in possession of a watch which would not be able to be repaired due to lack of technical support from Guess. However, Guess refuses to refund me although I have stated the above grounds that have led me to the decision of resorting to a refund and not an exchange. I am a staunch Guess supporter - be it accessories or apparel - however this experience leaves me disappointed as I feel that the customer support and understanding is extremely poor. I would not recommend the Guess Connect Smar****ch to anyone - best believe you will be left with a watch which fails to function properly and Guess SA will not support you technically.