Breach of Contract

On the 01/10/14 I purchased a 120GB data bundle for R1 800 which is valid for a year. Before I purchased this bundle I checked and confirmed that I was within the correct telkom mobile coverage zone. This was done via your website and with your instore consultant. Since my purchase I have been having endless problems. I am unable to use my data due the connection constantly switching from the telkom mobile network to the roaming network. This process prevents me from using my data. Since my purchase,i have only been able to use approx. 3G of data. Had I known that this would happen, I would not of purchased this package. I ported from MTN to Telkom mobile specifically due to this data offer. I checked before i bought the package and was assured that i would receive the full benefit. I paid alot of money for this package, I do not want more of your data as it clearly cannot be used. I request a full refund because what i signed up for is not what i am receiving. I am extremely disappointed in Telkom mobile and feel ****** of my money and my rights as a consumer. Telkom Mobile is not CPA compliant and needs to address this matter urgently as i will be taking it further.