Vodacom wifi poor connectivity

On 18 May 2020 I reported to Vodacom in Klerksdorp that for about 2 weeks I have had poor connectivity with my router. I was given a reference number *** and was told I would be contacted within 48 hours to address the problem. Download speed was 0.27mbps and upload was 3.79mbps. On 20 May 2020 I get a sms saying that they have completed the interaction and have closed the call 1. I was never contacted 2. The problem is still being experienced 3. Nowhere on Google can I find an email address to which I can send an email to take the matter further I would like this matter to be rectified ASAP