Nonsense Vumatel/SADV

Vumatel came to our neighborhood as a promising new thing that will make things easy for people regarding their wifi but, I now understand why people are complaining about it. They don't provide correct information and capture incorrect information. When I took out the service with them, they gave me a voucher number to pay, in my head I'm thinking that every month I'll pay, after pay day. Months goes by with no problem, I made my payments. In August, I woke up to no wifi and it's way before my pay day. I try to retrieve emails I got when my subscription was installed to get a number to contact and understand why. I managed to get details but it's for SADV. Their number, it's a whatsapp number and email address was given. I sent them an email in September, still haven't received any response from them. I then decided to whatsapp them. Only then I was. Explained why my subscription was disconnected and that my voucher number is only valid for 28 days, which that information was not given from the beginning, I was told to make payments every month. Didn't want to fight but I managed to make payments as I use my wifi for work purposes. September around the 22nd, I was disconnected again which the 28 days given hadn't reached but made payments on the 26 of September anyways. I decide to whatsapp and ask, when is my payment due. By my surprise, I was told I'm due the 20th of October but I made payment on the 26 of September, so I don't know how they calculate their 28 days if I made payment on the 26. I asked but told its from the 22nd to the 20th, which is not correct. It's a nonsense service, with their system capturing incorrect information. Their agents dealing with whatsapp also act like robots who don't assist clients or give clients options to deal with a matter. They tell you that they see I made payments on the 26 of September but still tell me that subscription is due the 22nd. I sent another email to SADV, they still haven't responded to my email. I'm just looking to cancel because I cannot deal with always worrying that my wifi will be disconnected anytime. It's nonsense service and hate the service given.