R19 promotion

The R19 promotion is not so straight forward. I placed my order on the 29th Dec 22, finally after lots of queries it was installed last week in Jan 23. The R249 was deducted and now the R549. When I enquiry about the R19 for first month, I was told... firstly it was a signing up fee. When I send a screen shot of their promotion I was then told the R19 was for the first month, calendar month, they delayed my order for nearly a month, then charged me the full amount and gave me 2 different versions of their promotion.