Complaint Regarding Customer Service Experience and Billing Issues

Hi,
at the Black Friday i called Telus to get me a new mobile line for my daughter if there's a deal like i got previously for my other kids as a loyal customer with Telus.
after the agent review my account he said i can't offer you a deal or credits like you have now with your exiting account, so i just gave up and hangup the phone.
after few days i found out the credits and discount i have with Telus despaired and my bill jump from $78 to $130.
so i called the customer server (Jane) to solve the issue after explaining the situation and what it's happen, The agent just side with her partner and she lied about the credits and discounts they removed from my account as a loyal customer with Telus and she said the credits expired and no longer available, she think i'm stupid, if the discount has expired i should see the expiration date on my bill like i see on home service bill. even the agent didn't try to solve the issue, i feel she doesn't care at all, if it's the way your guys trait your customers, very good Job !!!
those agents working against Telus benefits, instead of keeping the old loyal customers they make them go away to look for other provider
I'm going to cancel all the services home and mobile with Telus and tell my family and friends to do so, that was the worst experience I got with Telus 😡