Very irate and unhappy custome

Good dat I had opened an account with Woolworths and at some point I have financial difficulties that I could not pay the account and I then I was contacted that i was handed over to a debt collector. I then started making payment to settle and close my account. After months of paying, i decided to walk into a Woolworths at mall to ask if I still owe any amount to them, they advised there is an amount reflecting as credit however they will confirm if there is a credit or not, no feedback was provided, i then went to a different Woolworths store to the customer service and the said i should send an email to the finance department however the lady that assisted me on the day sent the email on my behalf. I then received an email in January that i has overpaid my account therefor there is a credit due to me and they asked i send my account details for payment, i sent it the 3rd and the 4th of Jan. I called after an they sad they received my details and i should receive payment within 14 working days, the 14 days passed and i called after a few days and a lady said she escalated the case to manager/ team leader, i waited i never got a call back so i called after a few days and the agent asked the email i send my banking details to, when i told the agent he advised i sent to the wrong email. after waiting so may days only get to know after i had to all them. I the asked for the correct email and i resend the details and still they do not acknowledge receipt of my email, i had to call again and only then they confirm they have received and that i have to wait another 14 days. i send a complaint yesterday advising that i will not wait for 14 days as the error and delay is on their side. Kindly assist as i am not happy with the service