Aklamio referral

I referred my dad to virgin media in June last year. His services were set up, all working since June. We were both supposed to receive our £50 each referral reward within 13 weeks but despite contacting both VM and aklamio, the rewards are still pending some 7 months on. All I keep getting as a response from aklamio is that it is down to vm to authorise the payment and they can’t help to speed it up and all I get from virgin media is to refer me to contact aklamio, which I have done multiple times. I’m sick of chasing, being passed from one to the other and getting nowhere! My aklamio referral portal is activated, as is my dads, the payments are pending but nothing more happens. 
This issue needs solving or I am going to have to refer it to the ombudsman.