Wrong data bundle selected

good day<br> <br> i have been in contact with mrp mobile since this morning, i am alwayss being told someone will contact me and this is never the case. my problem is, i tried to purchase a data bundle lastnite on the mrp buy airtime service, i selected R90 for 100mb or something like that then got a msg saying i purchased R150 500mb!! i have been trying to get someone to assist me as this is not my fault and was told that they can remove the data but the r150 will still be billed to my account! how ridiculous is that, all im asking is for someone, anyone and i know there must be someone who can reverse this Purchase. i am not paying R150 for data i dont need and which was a technical error! can someone pls assist me as i have not used the data there is still 500mb on my phone, i am not going to speak to a call centr agent as they cannot help and keep putting you on hold to consult with their \supervisior""; i am so tired of having issues with this mrp mobile it is really the biggest mistake i have made to have a contract with them i dnt know what i was thinking;its the worst service!!"""