Poor service

Poor service received I changed jobs so my salary date changed from the 27th to 20th which made a confusion in my debit orders however I would than make payments manually I spoke to a lady in April the 30th advising that I am in hospital but payment was made than last week I received an sms asking to call and update my banking details in which I did update it to the 20th I called you update on 17th the lady advise that they already put debits through so for this month I must make manual payment which I agreed so this month payment will br made on the 27th as per normal and than in June we can start to debit from my new account on the 20 June

To my surprise this morning I am getting sms to say my device will be disabled I send an email they called me I am asking the lady to hold she drops and disable the cellphone this is poor service and her tone when speaking to customers is unacceptable like we owe her she needs to do her job with respect can this be corrected or send me my account balance for device to that I can close my business with you please