I have accidentally added a real phone number to my test account, which counts towards our limit of 2 phone numbers that we are allowed to register.

However, when I enter the test account in business manager, I cannot delete the number. I also cannot delete the test account, because "there may be phone numbers from which the account could send messages". I am asked to delete these first, which as I described above, is not possible.

How can I delete the real number from the test account, or delete the test account alltogether=