Whatsapp Ticket not working for over 2 weeks

Vodacom has been giving me so much problems lately. I have purchased a 1GB Whatsapp Ticket on the 24/05/2021 (which is valid for 30 days). I have used the Whatsapp Ticket up until the end of May, but the beginning of June it did not want to work. When I check my balance it says I have over 700MB Whataspp Ticket left, but I still cannot use it. I have called customer service over 5 times during the past 2 weeks and up till now they have not resolved my query. I need assistance urgently. I will definitely not recommend Vodacom to anyone even though I have been a loyal client since 2013.