WORST CUSTOMER SERVICE EVER

I am trying to sort out a cancellation/return device since 1 July. Not two weeks (as promised) but going on three months and it is still not done. You can phone me 3x a day for payment of this specific device, BUT cannot phone when I ask you to sort it out. What is wrong with you???? Management confirmed the sales lady gave me the wrong info and the contract will be canceled and the device collected within 2 weeks. NEVER HAPPENED. I have to repeat my whole story every day when you ask me for payment. GET YOU ACT TOGETHER THERE ARE MORE COMPETENT CELLPHONE PROVIDERS - DO NOT EXPECT LOYALTY FROM YOUR CLIENTS IF THIS IS HOW YOU TREAT THEM. IN CASE YOU DID NOT REALISE YET - COVID IS NOT AN EXCUSE ANY LONGER FIX YOUR PRE-RECORDED MESSAGES and follow up when you promise to do so.