Bad service

I bought 5 Makro vouchers using my VodaBucks, I was only allowed to redeem 1 voucher, at the till when the cashier punch in the voucher it gives an error message 1 PER CAMPAIGN. I called Vodacom to report, the agent logged a complain for me, I then got a sms stating that my case has been closed I must call the vendor Digital Planet they deal with items purchased via the Vodabucks store, I received the sms on 18/12/2019 and on the 21/12/2019 I got another sms stating that Vodacom will send me vouchers regarding the ones that I could not redeem, which I did receive 4 of them. I then went to Makro to redeem them, same story at the till error message 1 PER CAMPAIGN, mind you I had to drive from home to Makro to redeem the vouchers for the second time using my petrol. Today I then decided to call Digital Planet to report the matter, the agent told me to call Vodacom as they cannot assist with vouchers, they only assist with items to be delivered. Either Vodacom should refund my points I used to buy the vouchers.