Worst service ever. No help.

Not happy at all. After making 4 calls from a landline we still cannot find out how much our amount to pay is. Asked for the teamleader and I got cut off. When doing a security check we dont qualify because we did not answer all 7 questions correctly after explaining that the email address, numbers and physical address changed. The ID number, date of payment, bank name and client name is correct. Do they want our money or our business thats the question?