Vodacom electricity service provider

Through the Vodacom app, I purchased R400 electricity. My payment went through the bank, but no electricity voucher was received. Vodacom told me to email the Company, their selected service provider, namely VPS, or ***. I have mailed them 4 times over the past 10 days, they rep**** to one mail only, asking for my cell number, a week ago I gave it to them, and since then, nothing has happened. This is actually theft, imho, and maybe I should lay a charge against them? Vodacom, this is your service provider, you must sort it out. Unbelievably poor service from both of you