Do you know of any Universities offering an undergraduate degree in Maths by distance learning other than the Open University.It is important that the content is in English language and any tutors will be able to deliver any online tutorial in English.
You could look at Massey University. I have known many people to use this university's distance program, undergrad and postgrad, and they have had good experiences. It was even recommended by my local university as the best option for a non-contact course.
Below are the available Maths/Stats distance papers this year - enough for a full degree.
160.101 Calculus I 160.102 Linear Mathematics 160.103 Introductory University Mathematics 160.111 Mathematics 1A 160.112 Mathematics 1B 160.203 Calculus 160.204 Differential Equations I 160.211 Linear Algebra 160.212 Discrete Mathematics 160.301 Analysis 160.314 Combinatorics 160.318 Differential Equations II 160.320 Mathematics in Education
161.120 Introductory Statistics 161.130 Introductory Biostatistics 161.200 Statistical Models 161.220 Data Analysis 161.221 Applied Linear Models 161.223 Introduction to Data Mining 161.304 Advanced Statistical Modelling 161.322 Design and Analysis of Surveys and Experiments 161.327 Generalised Linear Models 161.342 Forecasting and Time Series 161.380 Statistical Analysis Project