Irregular billing

My account was debited 3 times in 1 month. 1.On 13/12/2019 my account was debited and I called because the agreed the debit date is the 25th of each month. I did not consent to my account to be debited prior to that. When I called on the 15th I was advised to send my bank statement, of which I did and I was told that I will receive a phone call addressing this issue. Even today I have not received that phone call. As a result I reversed the funds. This is disappointing. 2. On the 20th my account was debited again and I did not have a problem with that. I was happy with the debit. 3. Today (24/12/2019) my account was debited again, as to why are they debiting my account again I do not understand. I called today and I was told hold on the phone. After 15 minutes of holding the lady came back and informed me that she get not get through the accounts department.