Existing clients not appreciated.

I have a contract that expired with TELKOM. Telkom currently advertise a sale on some older model cellphones. I requested a callback yesterday so that I can upgrade our current package to a Sony Experia XZ2 for R169pm with one gig data on free me. The lady called me back this morning so I was impressed by the callback. Once I mentioned that I wanted to upgrade she advised me that these devices are only available on new (sales) numbers. So TELKOM will give new clients betters deals than clients who want to upgrade since the Sony Experia XZ2 is not available among the upgrade options. So TELKOM what I am going to do is move over to another Network and then come to you as a new client. So TELKOM why don't you offer your existing clients these deals but only to new clients. TELKOM is a joke! Loyal clients are not appreciated and new clients are sought after and offered better deals. Come on TELKOM. Give me a call and discuss this business model. Your agent was not even able to help me with a request to be transferred to upgrades and discuss this matter properly.