Hello Valentine Steisel and welcome to the Microsoft Community!
Based on your feedback, you're wondering about how long it takes to receive a call back from Microsoft
This call is usually one to three days, but by your description, I also find it odd that they closed the case without calling you
Did you go through the following link:Contact - Microsoft SupportContact for support?
If not, you can use this link to contact phone support again, which is usually done first via online chat
Gather the details of your issue and then a support person will call you on the phone.
Because our teams are different
If you have a problem, you can also upload it to me and I'll see if I can help you.
In the meantime, I don't think it's a good idea for phone support to do this.
I hope you find the above information helpful and I wish you all the best in your life!
Kirito|Microsoft Community Support Specialist