Unbelievable

have been on hold with Telkom Mobile to sort out my billing enquiry. I cancelled my contract with them 6 months ago and i'm still getting emailed for a credit note, i called today and keep getting transferred to this department, when i eventually get through to the correct person, she puts me on hold because she has to log a call for the billing department to pay me back. I hung up becuase i held for a good 10mins... and on the phone with them for 25mins. Can somebody call me back or better yet, can you please just credit my account.