Quick to debit,not so quick to refund

It was my first time ordering from Webafrica,i ordered a LTE sim card,i was supposed to pay 209.00 for delivery,but i was doubled billed so i was debited twice, i sent numerous emails and finally i was refunded 209.00,the remainding 209.00 was for sim delivery,i kept on having an issue when uploading my rica documents, finally i decided to cancel the service and requested a refund for the balance of 209.00,first i was told thay they already refunded me(referring to the first refund because if double billing)after numerous emails i decided to phone,i was told my refund will be processed the next day,i waited 2 days before writing another email i was then told that once my refund was cleard Webafrica will release the money,its almost been a week and no refund,to my surprise i get an email today stating that i owe them 250.00 what for i dont know,i clearly stated on my many emails that i want my account canceled, and i never recieve the sim nor did i use their service,im very disappointed,ill never recommend them to anyone