TFS bad service delivery

Good day, after buying a new Toyota, and financing it with TFS I made a deposit for a capital reduction on the 5of feb. I filled in all the forms as well as the proof of payment was sent through. I received a mail stating that a consultant will be contacting me within 48 hours. Today the 15 of feb I decided to call the call center to find out what is going on as I have not received the above mentioned call. The response to that is that they did try to call me, twice in a matter of 5 min and could not reach me, thus send a sms to call them. I say on a farm and with our great network coverage I do not always have signal. now they say the installments will stay the same for this month cause I did not contact them soon enough. if you have to make a call to the call center they expect you to hold the line for a consultant for several min, but they cant afford the time to call you again if they did not get hold of you the one time they phoned. they have their money and so why should the worry about their clients. this is unacceptable!!!!! if you as the client want some thing from them you are forced to try and try again to get it done but from their side 2 calls within 5min and a sms is enough!!!!!!!