Smart shopper points flushed down the toilet

I am very dissatisfied with the lack of service delivery. I've been trying to resolve a matter since October 2017. I've called in. Logged complaints twice on your online platform and still no response. So this is my last resort. In a nutshell. I wanted to use my points with one of your partners. To try this extra offer as part of your Smart shopper experience. I bought two tickets. One one each of mine and my husbands cards. We went to the movies only to end up paying for our tickets as the vouchers didn't work. We went the same day. So it should've worked. We then went a month later to another cinema. Same problem. Ended up paying for tickets as we didn't want to waste the trip. This happened, yes a third time in December. So we gave up. And requested that you reverse our points as we cannot use the tickets. Why offer something and then I have to endure 3 embarresing encounters with vouchers not being valid but within 3 months of expiry?