Utterly disgusted by By service

I am utterly disgusted by the service that I received from pick n Pay San Ridge. I went there on the 27/05/2015 to buy R45 CellC airtime and was told that I can only get 35 and 49. I took 49 as the difference is just R4. Got home and recharged and got no confirmation text. I called CellC only to be told that it has been loaded as I bought All on One. I've never heard of this type of voucher as I buy airtime to contact MTN,Vodacom and landline numbers. And was told by CellC to go pack to the store. Went there this morning and told the manager what happened advising them that I needed to send some important emails this morning. They told me the issue can only be resolved when the cashier is there. I left my number went home and sent the emails and I told the managers about this.when they call me they only provide me with R35 airtime. When I ask why? They say cz I've already used 15MB. I'm like but I told you I would use this. When I said I wasn't happy about this, they dropped the phone in my ear. This was a first. Hoe is it my fault that I go into a store and buy what I ask for only to be given something else by an *********** staff and I have to suffer for it. Will go to ombudsman