3rd party payment / Momentum

I bought Woolworths vouchers and paid via their 3rd party. The transaction came through as unsuccessful I then followed the same process with the same result. I checked my banking and both transactions have been deducted but there is no record of the purchases / vouchers. R6000 has been deducted. I have emailed and been in touch via their helpline - still no further. What’s going on with the 3rd party and communion with Momentum???