OUT OF STOCK/FEEDBACK

I have honoured my 24 month cellphone contract at Telkom and I went to the shop to apply for an upgrade for WIFI-Router LTE. However, it's been more than 3 weeks since i have been waiting for the device or waiting for someone from Telkom to call me. I have went there 2 or 3 times but every time i go there i'm told that there's no stock. Last time the gentleman working there gave me his email address but i have been sending emails asking about the device but i get no reply. There arn't even contacts for the shop so i can't even get through to them so the only way is to always be travelling to TELKOM everyvtime. I really don't think it's fair and good service that i have to always travel to Telkom to ask if the devices are available. And it's not fair that i'm still paying the same amount I was paying for my previous device after 24 months without gaining anything because the devices are out of stock.