Overcharged by Makro Woodmead store

On 14th April 2020 I purchased the Canine Cuisine dry dog food (15kg) advertised by Makro for R385.00 at the Woodmead store. This promotion runds until 3rd May 2020. When paying for this I was charged 435.95 (Invoice ***). I reported this to te Mako Customer care on same day (issue 670077) and received a response on same day to advise that the query was forwarded to Makro Woodmead Store and that they would respond back once they have been in contact with the relevant superiors at the store. On the 22nd having had no further response from Makro I sent a further reminder on the issue. To date I have still have not received any response from them. Note that I have been a Makro client for over 20 yrs and this is the first time that I received such poor service