Advice needed – Contact form that can handle API

Hi there.

Need some advice on plugins to use. Tried some and on a dead end.

-Need a contact form that I can customize. (basic stuff)

-Want to integrate a service to send sms directly to client as confirmation once they complete the contact form.

-Some contact form plugins offer this already but don’t have a carrier for South Africa.

-I currently use services for this. Sample code below:>=user&password=abcd1234&message=Hi+Mom+%26+Dad&msisdn=+27800000000

Any suggestions or advice?