When it comes to getting an ex back there are so many moral, magical, and relationship questions that need addressed, but for the sake of everything, I'm going to assume you already did, you're 100% sure about this, and you want to go about this without preforming a spell or ritual yourself (whatever the reason maybe, for example, you want a professional or someone more skilled)
Love magic is one of the most controversial and... annoying forms of magic, in the sense that it is almost always strongest done by your own passion. Anyone else doing your spell for you might not be able to preform it as well. Now some empaths can be incredibly good at using your own emotions to fuel the spell, but it's quite the skill to have.
With that reasoning, I'd say you're probably better off casting your own spell. 1000 Euros (1470 in CAD and 1186 in USD) is a lot of money for something you can do yourself. I'd pass.
If you need help though, this website has so many spells you can cast or use to write your own! There are also plenty of people here, many experienced, who can help you write a spell or guide you through the process.
Just my personal opinion, but this is probably a scam. Asking so much for a spell just seems unreasonable. Plus if you're having a problem communicating, I would suggest not doing it because miscommunication with stuff like that is just not good.
Also if someone is willing to do a spell that takes away the free will of another, I wouldn't trust them.
I think maybe it's best you do your own spells, and maybe not one that makes someone love you, because at that point it isn't really love (in my opinion).
I'd suggest spells that deal with heartbreak, or spells that bring the people in your life closer to you, strengthen the relationships you already have in your life.