Poor service

I have ikeja internet service provider in my house, I paid for April on the 26th of March an amount of R500 as agreed which is my monthly subscription , service was cut off today, the money doesn't reflect on their website, I called the bank and the bank confirmed the money was paid to their account and their account is active. I have been communicating with the company through their whatsapp without winning, I sent them proof of payment several times up to now I'm disconnected, lost a days work, they are just not helpful.