I won’t comment on specific wording, because I’m going from a translated version, but it should be close enough to get the gist of the overall messaging. And I do have some suggestions along those lines.
The first thing I would do is align the messaging with the offer. It appears that the page is about your services but the call-to-action is to sign up for discount vouchers. If that is your offer, then the page should be about that. You can feature information about the services, but it should be in the context of how the user can use the vouchers.
I would also spell out the offer details a bit more. What is the frequency of the vouchers? Is it one just one time, or is it the type of thing where they will get offers throughout the year?
You may want to consider testing a simpler form with less fields to reduce friction. Some people may be wary of providing a phone number, for instance.
Adding a bit of social proof would help as well. Do you have any testimonials you could add?
Best of luck.