Horrible Network provider

I bought a RAIN SIM card on the 20th October and I received it on the 22nd October. The sim started working on the 24th October everything was fine. On the 1st of November started having network problems thought it would go away it was a daily struggle till I sent an email to them on the 6th November, there’s no call center or customer service number one can report the problem which is intresting, nonetheless.Gerhard Kruger rep**** to my mail and advise I cancel the sim he will escalate the matter to the Billing department to request a refund as I asked for my money back. Today I got an email from Teboho Lenka who did not acknowledge my problem about network issues I’ve encountered she just advise I can do a cancel however I will be charged a Pro rata from the 1st to date because I canceled, it was a back to back conversation with me telling her I will not pay her I need a refund because I hardly used the sim it gave me problems but Teboho was insisting that I will have to pay the pro rata and did not resolve my issue. The sim was cancelled immediately and I request a Full refund.