Ongoing failure of Healthy Gear cashback payment

Query Vitality ref #***.<br> I have been struggling since February this year to get my Healthy Gear cashback paid by Discovery for purchases made in January 2015. <br> After repeated requests (I have a full record of correspondence) it was finally resolved and I was advised I would be paid at the beginning of June. Once again no payment was made so I followed up and was advised on 22 June as follows by Discovery: \We have manually calculated your cash back for the HealthyGear purchases that you made from Totalsports in January 2015. This cash back should be paid to you within the next three to five working days.". As at this morning 30 June I have still not been paid. """