Poor service received from Old Mutual

I have been trying to change my debit order date since 2 May 2025. No response from Old Mutual. Today is 3 June 2025. My debit order date has not been changed. I have sent more than 5 e-mails, and every time I get a response that "we are attending to your query". I simply want to pay my debit orders but nobody at Old Mutual is interested to assist me. I want to give money to Old Mutual, they are not interested to provide a customer service. Bad choice.