I very much doubt that people in your area got their ceremony one week after they had their test. Frankly because one week is not enough time to let you know when and where to appear for your ceremony. They let you know with a letter about 2 weeks in advance.
When I did my test last summer, they had a powerpoint explanation on how to take the test. One of the screens said that the ceremony would be approximately 3 months after the test. I was planning to travel so I asked my local CIC office how it works and they said it would normally be 2-4 months. I ended up having mine actually a bit less than 2 months after my test.
I already told you that you should be patient and wait. You are not even 2 months yet, since you had it on May 25th. You are about week short of 2 months. Posting here and worrying about it is not going to make it happen faster. Go to your local CIC office and ask them how long it normally takes. My office told me 2-4 months. Maybe yours is busier.