Bad service

I have a bad experience whereby their wifi connection is concerned I used to buy the voucher on time and it will not connect me same day I will write whatsapp messages using the whatsapp number that says Capetown, no one bothered to call me at all I will receive automated messages, now I stopped purchasing the voucher I cannot buy something that does not connect me I am being harassed getting calls from *** asking the reason I am not buying the voucher I explain to the lady who called me asked the whatsapp number I told her it's the number that is in the website says capetown when applying for ikeja, she asked me to get the number no I work for the bank and busy with finances she can check the number herself and she is supposed to know, I can drop what I am doing and look for the number, yesterday I received again calls from ikeja I ignored the calls due to my work conditions I bought the voucher it is not connecting me I've been having this issues since I started with ikeja. I cannot buy R350 voucher and not connect and is it not supposed to last 30 days if I buy it 5 days before month comes month it expires its day light ******* they can disconnect it I can always take it somewhere else vodacom / mtn