I still use Zen and their support has been excellent so far. I recently had a line issue and they were very helpful (as were Openreach). They also throw in good routers with 12 month contracts (or you can use your own).
FYI, This is why I left Zen... copy of my review on trustpilot below
On top of this, any time I contacted them for any reason, it tooks weeks of chasing to get any response.... all depts, support, customer service, billing, none of them ever responsed.
I almost always had to resort to sending a complaint on twitter to get someone to reply to tickets.
I had now reached the end of my tether with Zen
I had now reached the end of my tether with this provider and am now transferring to a new provider.
Not only has their service gone down hill over the last few years but has now reached absolute rock bottom levels of unprofessional and unethical customer service.
For the last 10 years my line has been unable to get the speeds claimed and Zen have just fobbed me off with excuses claiming that it was because I was too far from the exchange etc, even though neighbours were able to get those speeds.
However after having a 2nd line installed, this line was able to get the full speed which Zen had claimed was impossible, thus proving that the original line did in fact have a fault.
I finally got them to send an engineer out.
The first one changed the BT socket, which mad ethe first improvement and got my speed up from 25Mbps to about 30 Mbps.
Since the line was still not reaching the expected speed, a second engineer was sent, who actually got up on a ladder and checked the physical line into my property and found that it was corroded on both end, fixed the problem, and voila I was suddenly getting the speeds that Zen said were complete impossible.
However after the original issue was resolved, I then started getting line stability issues and it was up and down like a yoyo. They stated this was due to the router they provided had a chipset that was not compatible with my line, which was also causing problems (their words).
Yet they refused to take any responsibility for this and provide me with an alternative router, even though they provide both the line and the router, and told me that it's my problem.
Zen are now blatantly lying and denying all previous conversation and denying that either of the engineers ever found any problems at all and never fixed or changed anything.
They are also now falsely claiming that the reason for my complaint is that I am trying to get speeds greater than the line is capable of (38Mbps), which of course is not true.
I watched the engineers replace the socket and fix the line with my own eyes, he explained the problem to my face, he reported the problem to Zen, and I discussed it with Zen on both occasions.
I have the emails/tickets with the previous conversations, recorded phone calls, Plus the fact that the line speed increased after the engineer visits, was this by magic?
Do they think they can wipe my memory with Jedi mind tricks or somehting?
Since I moved to BT (also not fun) , it took many engineer visits to fix the line stability issue which Zen has refused to fix. The engineers also told me the excuse about the router chipset was total nonsense.