Wifi not uncapped

I have a contract for uncapped wifi. I have noticed a trend over the last 6 months. During the first half of the month my network speed is good. However, during the second half of the month, the speed becomes extremely slow. I have also heard other people complain about this.<br> I called Telkom to ask why this is happening. The call centre agent told me it is because I use a lot of data.<br> Really??? I have a contract for UNCAPPED wifi. Of course I will use a lot.<br> I want to know if this is a ploy from Telkom to reduce the data usage of customers with uncapped packages in order to save money. Why else would this exact same pattern occur at exactly the same time of the month? Something is not right and I smell a rat.<br> I want to get the service that I pay for. Uncapped wifi at a speed as defined by my contract