DONT BELIEVE VODACOM !!!

Buying double data on MY VODA app dos'nt work ! 3 times I have purchased double data ie 1 time 5GB (2 X 5 GB is advertised) on purchasing you only get 1 X 5 GB be careful I complained per telephone and was told that the MY VODA app was faulty and they gave me back another 5GB manually.Yesterday at 5am I purchased another double data 10 + 10GB was advertised again I only got 1 X 10GB I then sent an email and the response said that I already had 10GB on my account ?? it should be 20GB so be careful they are not supplying what they advertise !! Their agents are also not very well at understanding the problem