Terribly slow internet connection speed

<p>I use a 200GB Cell C prepaid data card. My 50GB peak data works fine, but my 150GB night data works terribly. The minute the clock turns to 24:00, my data stops working. This is due to a high traffic congestion on the Cell C network. I've exhausted myself calling Cell C countless times, had several technicans come and asses the problem, and the end result is that there are not enough sites (Cell C cell phone towers) in my area, even though my nearest Cell C site is 500m away from my house. I've been advised to Roam on Vodacom as I do have this possibility in my area, but it does not want to work. If I roam my handset on Vodacom—calls, USSD codes work, but my data will not work, even though data roaming is activated. The same proplem also persists if I roam with my ****le in my PC. I am fed up with this problem. Every night I try to download something it does not want to work, or is extremely slow that I cannot do anything with it. This problem is happening for the past couple of months, and I have a lot of data that is about to expire (17 Nov. 2016) due to the inablity to use it. If Cell C does not fix the Vodacom roaming issue in my area, I want a FULL REFUND for my data as I cannot use it. </p>