Vouchers not re-instated

Woolworths app was updated last year around June, and when it was launched I couldn't log in for months. After 12 phone calls I kept getting told I would be informed when the problem was solved. In September I tried to log in and I was able to, however the vouchers owed to me during the period June to September were never re-instituted, (except the ones for September which had already expired without me knowing). So again I called to resolve this new issue and I was sent from pillar to post, and those vouchers were never re-instated.