Will Dell Honor $48 Credit in "Good Faith"?

For the past 2 months I've been trying to get a $48 credit from Dell: (1) In April 2016 - Made a purchase using my Dell Advantage Rewards Gift Card and my Dell Preferred Account (2) On 4/19/2016 - Dell "priced match" my purchase which I would be refunded $51.84 (3) Dell Customer Service Rep said my Dell Preferred Account would be credited in 10-15 days (4) On 5/13/2016 - I verified my Dell Preferred Account and there was no credit (5) I contacted Dell, the Dell Customer Service Rep said to wait another month (after the billing period closes) (6) On 6/17/2016 - I verified my Dell Preferred Account, I was credited $3.84 (missing $48 credit) (7) I contacted Dell, the Dell Customer Service Rep said the $48 was credited back to my gift card. (8) I told the Dell CS Rep that I used a Dell Advantage Rewards Gift Card and according to the Dell website, money "cannot" be added back to this Gift Card. (9) The Dell CS Rep began arguing with me and said that I received the $48 credit to my gift card (the CS Rep hung up on me) (10) On 6/22/2016 - I called Dell Customer Service and was transferred 4 times and still no one would help me. (11) On 6/27/2016 - I tried to call Dell again (Gift Card Support) and put on "hold" for 45 minutes and then I hung up (I couldn't wait any longer) I NEED HELP! I cannot seem to get the Dell CS Reps to understand that "money cannot be added back to the Dell Advantage Rewards Gift Card" (1) Any suggestions? (2) Who do I need to speak with to in order to get a $48 credit? Signed...a loyal customer of 17 years who is now totally disappointed and frustrated, Tappingtoto