unsatisfactory service and poor service.

I received an email on the 9th February 2022, stating if i upgrade my fibre i qualify for free fibre for the rest of the month. I upgraded immediately. When my debit order went off this month for the upgrade amount i enquire about it. I was told i don't qualify for the free month i should have upgraded in January to qualify. The advert stated if i upgrade now i'll qualify for free for the rest of the month. As i calculated the debited order should have been deducted the first of April. I was busy on there whatsup line for 2 days and all they say i don't qualify, so i called today and got though to sales to speak to a manager and i was transferred to customer services and i waited for almost 30 min so i cancelled the call.